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Establish your objectives and set your schedule accordingly. Build muscle and endurance. Develop mental and emotional strength. Assess your financial situation.
Are you trying to start a full-fledged career, or are you more interested in getting a short-term entry level job and seeing how things go? While there are thousands of crew positions available in Alaska during the summer and demand for hard-working people is high, you don't have a chance of getting hired if you can't set aside significant time in your schedule.  Typically you will need a minimum of two months clear to land an entry level job in Alaska. Most entry-level jobs for those with little or no experience are on salmon boats called trollers, gill netters, and purse seiners. The salmon season begins in May and extends into the fall. The longer your availability is within this window, the more likely it is that you will find a job. All jobs in the Alaskan fishing industry, and especially entry level jobs, are strenuous and grueling. You will be placing yourself in a highly stressful and demanding environment. A fishing boat is not a place where you can work yourself into shape. You'll need to be fit in advance. When getting in shape for a fishing job, it is best to focus on building up functional strength. Being able to run ten miles or bench press 250 pounds won't do you as much good working 18 hour days on a fishing boat as core stability and overall functionality. Understand that your body won't be the only thing that will be tired at the end of an 18-hour day. Your mind will be worn out and your emotions frayed. As is frequently illustrated on TV shows that deal with the Alaskan fishing industry, the captain and rest of the crew can be particularly hard on green hands. Learn to deal with stress accordingly.   Different people prepare themselves in different ways mentally and emotionally. Find a way that works for you. Focus on developing both a learning attitude and a thick skin when it comes to criticism. As the old saying goes, sometimes it takes money to make money. As you'll discover on your job search, it can be very difficult to land a guaranteed job in advance prior to going to Alaska. Many job seekers have to move to a fishing hub first, and look for a job in person. You'll need to have the financial wherewithal to secure yourself housing and cover basic expenses if you opt for this route. Even if you don't move to Alaska without a job, planning to get a job in Alaska could compromise your ability to take a local job, possibly leaving you stuck at home without a summer job at all. Don't put all your eggs into one basket unless you can afford to have them broken.