While slowly extending your spine in a controlled manner, you can reach around your back and put pressure on the area that has the most tension, which will induce a little more focused extension there. This movement requires a little more flexibility, especially from your upper body and arms. The spine tends to have more range of motion from side-to-side than it does in extension, so rotation tends to be a safer or more forgiving motion.Rotation of the spine can crack most areas of your back, especially the lumbar region or low back.  While standing with your feet shoulder-width apart (for stability and balance), place your arms in front of you, bent at the elbows. In a controlled fashion, rotate your upper body as far as you can in one direction, then switch and do the other way a few seconds later. You can use some momentum by swinging your arms, but be careful not to go too far and risk pulling a muscle. Repeat as many times as necessary, but once you crack your back, it won't crack again at the same spinal segment for between 20–30 minutes or so. It takes that long for the joint to reset again. Rolling on a piece of firm foam is a good way to massage your back and it also increases the likelihood of cracking or popping some spinal joints, especially those in the mid back region (thoracic). Foam rollers are commonly used in physiotherapy, yoga and pilates. Another way to rotate the lower half of your spine is to do it while sitting, which might feel more stable and easier to control. You can also use your arms and hands to induce a little more rotation without having to swing your body, which is likely a little safer.  Sit on the floor with one leg bent at the knee and the other leg extended — it does not matter which side you start with because you'll switch and do both sides a few times. With the foot of the bent leg on the ground, push with it and rotate your torso in the opposite direction, using your hands to stabilize you and induce more rotation. Try to look back over your shoulder on the same side as your bent knee. Wear runners so your feet get more grip to push with. Rotating your spine while sitting in a chair is helpful because you can grab parts of the chair to gain additional leverage and rotation. Spinal joints need to go slightly beyond their normal range of motion in order to crack, so using a chair to achieve that may be your best bet.  Sit facing forward on a stable chair. While trying to keep your buttocks and legs in the same position, rotate as far as you can in one direction (holding for a few seconds), then go in the other direction. Breathe normally while doing this. Grab on to the sides or the top of the chair to gain more leverage — a wooden chair works well in this regard. In this position, your lower lumbar spine is the most likely to crack or release. Another way to crack your mid-to-lower back is to lay on your back (supine) and use your leg / knee as a lever in order to achieve rotation. Make sure the floor is cushioned or padded for the most comfort.  Lie flat on your back on a cushioned floor, raise a leg to your chest while bending it at the knee. Then pull on the outside of your knee towards the floor with your opposite hand, which will create rotation in your lower back and hips. Your may feel the low back and/or hip joints release and crack with this move. This is a similar position that a chiropractor or osteopath will put you in for adjusting your low back and hips (sacroiliac joints).
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One-sentence summary -- Extend your spine with help from your hands. Add some spinal rotation while standing. Use a foam roller. Rotate your spine while sitting on the floor. Sit in a chair to get more leverage. Do a twisting stretch while lying on your back.

Article: Dyeing your hair, especially a unique color, requires some steps. The last thing you want after going through the trouble to dye your hair is to realize you want a new hairstyle. If your natural shade is dark, it will be harder to get the color to show through. You can always go for a darker shade, but the color may not be as vibrant than if your hair was a lighter hue.  Lighter hues can also affect the outcome of a dye job. For example, if you are yellowish-blonde and try for a shade of red, your hair may come out orange. Go for blue, and you may end up with green instead.  White or grey hair can also make dye much brighter than it actually is. A blue-black shade, for example, could become bright blue.  To prevent these mishaps, it would be best to do a test strand before coloring your entire head because it will give you an idea about how the color will turn out. A common recommendation is to never go two shades lighter or darker than your natural hair color. The best thing to do is start with a lighter shade. You can always go darker later if you want.  Some shades may not work with your skin tone. If you have a tendency to blush, for example, you may want to avoid going with any pink or red tones. If you have pale skin, bright greens, and yellows could make you appear to be glowing. To see how shades look on you, visit a Halloween store and try on a few wigs to see how the colors look. Aside from your hair dye of choice, you'll need to gather a few items to make the process easier. Keep these stored in your bathroom for future dye jobs.  Plastic hair clips: These are useful for holding large sections of hair out of the way.  Rubber gloves: Hair dyes can contain some pretty harsh chemicals. Wear gloves to keep your hands safe. They'll also protect your skin from taking on the same color as your hair.  Vaseline: Spread a thin layer on your hairline and on your ears. Put it anywhere the dye might come in contact with your skin. Vaseline prevents the dye from staining your skin.  Old clothes and towels: Dyeing hair gets messy. It's always a good idea to use materials you don't mind ruining. Other items such as a kitchen timer, q-tips, spare gloves, and extra dyeing brushes are also good. While you could dye your hair on your own, the process will be much easier with a friend. Having an assistant who can get to those hard to reach spots will make for a smoother dye job.
Question: What is a summary of what this article is about?
Get a haircut. Consider your natural hair color. Choose a color that suits you. Assemble a hair dyeing kit. Find a friend to help you.