Due to aviation's definition by the feds as a 'quasi-military occupation', you can deduct a number of things that, to other people, are simply hygiene related. Haircuts, shoeshines, FAA medical exams, uniform purchase, cleaning, altering, shoes worn for work and their resoling, etc. Money wasted adding to Kit Darby's fortune can be partially recovered by writing off the dues. Money well spent on tips to van drivers and line service folks (that aren't reimbursed by your company, obviously) are deductible. Watches, sunglasses, headsets, flashlights, suitcases and flight bags, repair for suitcases and flight bags can generally be written off. Due to ATA's total reliance on IVR phone systems and the internet for every interface with their employees, I absolutely write off my cell phone purchase and service (which is a relatively modest $60 a month).
The feds are about ten years behind in recognizing the value and usage of computers, but allow laptops used in the performance of a job to be amortized over five years. I think this is directed mostly to businesses with mainframes or network computers, but it applies to small business users, as well. My tax accountant is going to try to write off a significantly larger portion of my new laptop in 2003, since nobody can get a laptop to last five years, anyway.
Don't forget to calculate your allowed per diem versus the amount you collected. Until you hit the majors, the IRS allowed per diem is way beyond what anybody actually collects. IRS doc 1542 states what amount is allowed by overnight city, and when compared to what you actually were paid, you can deduct the difference. In past years I managed to write off several thousand dollars in uncollected per diem. I'll let somebody else go through the process for figuring the allowable per diem amount, though.
All this is simply masturbation unless you have enough deductions to beat the 2% of gross earnings floor. Having a mortgage pretty much guarantees that you will be able to itemize, but without one you will have to have a serious butload of unreimbursed expenses to make the cut.