You'll need fuller's earth clay, plain yogurt with live cultures, honey and optionally aloe vera and tea tree oil. The clay may need to be bought online, although you should be able to purchase it from a hardware store. The rest should be available at large grocery stores. Mix two tablespoons of the clay with 1 tablespoon of yogurt, 1 teaspoon of honey, and either 2-3 drops of tea tree oil or 1 tablespoon aloe vera (depending on if you want these). The tea tree oil is good for fighting acne, the aloe vera for repairing damaged skin. Wash your face first. Then, with the ingredients completely mixed, use a clean brush (like a paint brush or a cheap makeup brush) to apply it to your face. Be careful not to get it in your eyes. After allowing the mask to sit on your face for at least half an hour (1-2 hours is best), rinse it off completely.

Summary: Gather your ingredients. Mix the ingredients. Apply the mask to your face. Rinse the mask.


RGP lenses tend to be slightly less popular than soft lenses for a number of reasons, but there are many areas in which RGP lenses excel. An RGP lens will have the following benefits for most contact lens users:  Sharper vision than soft lenses provide Better visual clarity for some users with astigmatism Preferable for some users with presbyopia who require bifocals or multifocals Better fit and clarity for users with Keratoconus (cone-shaped cornea) Preferable for individuals who need contact lenses after refractive surgery Can be used for ortho-k procedures, in which lenses are worn at night to reshape the cornea Though RGP lenses are preferable for some users with specific needs, there are also some down sides to these lenses. Some users report that RGP lenses may have the following disadvantages:  They take longer to get used to and may be less comfortable. They will need to be worn regularly to become comfortable for the user (they can even become uncomfortable after a week of not wearing lenses). There is a greater risk of RGP lenses becoming dislodged during physical activities due to the smaller size of the lenses. There is a higher risk of discomfort or corneal abrasions due to the increased chance of dust/debris getting lodged under the lenses. They require greater care and maintenance than soft lenses; however, they tend to last longer, which may save you money in the long run. If you're on the fence about soft vs. RGP lenses, you may want to consider trying hybrid contact lenses. Hybrid lenses are made with a rigid, gas-permeable center but have a soft ring around the RGP component. This gives you the comfort of a soft lens while meeting the specialized needs some users have for a rigid lens.  Hybrid lenses can be used to correct nearsightedness, farsightedness, astigmatism, age-related loss of close-up vision, and keratoconus. Many users who need rigid lenses find that hybrid contact lenses are much more comfortable and easier to wear.

Summary: Learn the advantages of RGP lenses. Know the disadvantages of RGP lenses. Consider hybrid contact lenses.


Since you're the one with the idea for the product in the first place, you'll be the first line of testing. Try out your product on your own and see how it works. Keep track of little frustrations, elements of the product in need of tweaking, and spend a good deal of time using and thinking about the product you're testing.  As you use the product, keep a journal or a voice recorder with you to keep track of your experience of the product as you're using it. You might tend to remember all the bad or all the good later on. Don't just use the product, abuse it. If you're thinking about going into production, you'll want to find out what your product is made of, and whether or not it'll stand up to people throwing it around, dropping it, and the other trappings of real-life ownership. Is it fragile? Could it use some reinforcing? . This is one of the most important parts of developing a product. Who's going to buy what you're selling? Who, like you, will have experienced the same frustration or desire that this product will fulfill? How will you reach that audience? The next step of your process will be getting other people to use your product and give you feedback, so you want to define your audience as specifically as possible in terms of several criteria:   Age range Socio-economic status Level of education Hobbies and interests Prejudices and opinions Bring your product to a group of people, let them try it, and give them the opportunity to provide feedback. This could be as informal as giving a few cases of your home-brew to your friends and family and listening to them review it, or as formal as doing a serious focus-group session with a series of different test groups.  If you want to do an informal feedback session, treat it as seriously as the product warrants. Your parents and your friends will likely tell you that your new beer is "Delicious" to be nice, but also give it to some serious beer drinkers to find out whether or not you've got the stuff. If you conduct formal focus groups, do several runs with different groups of people. Your audience may be slightly different than you originally anticipated. Listen and gather feedback. As you give your product out and introduce it to unfamiliar users, start collecting first-hand feedback. Write up surveys, conduct interviews, and listen closely to the feedback given. Often, the difference between products that catch on and products that fall by the wayside is the ability of the inventors to incorporate feedback into product development. In some cases, you might find it more effective to allow someone else to gather feedback about your product from testers. You may be inclined to defend your product against criticism, whereas a more unbiased researched will have an easier time collecting this feedback. Steve Jobs wasn't a renowned inventor. He was a genius tweaker. The best products aren't usually the result of great leaps forward, but of little changes that make a good innovation or concept into a great product that you can sell. Incorporate the feedback you receive about your product into tweaks and revisions that will take it from good to great. The feedback you gather will likely not have great ideas about ways in which the product needs to be changed, but you can listen to the criticism that occurs and come up with your own ideas about how to address those complaints. So people found your book prop somewhat complicated to use? How can it be easier?
Summary: Use the product yourself. Find an audience Do a series of test trials. Gather criticism. Revise the product.