Whether you're on the job or looking for one, it's easy to rack up a hefty tab of related expenses. (Toner isn't cheap!) If your company won't reimburse you, don't just swallow the costs. Some expenses can be written off come tax time next year. According to the IRS, you can deduct certain expenses to the extent that they exceed 2 percent of your adjusted gross income. So whether you're cabbing it to an after-hours work function or schmoozing a potential client over drinks, be sure to save those receipts. You'll need them come April.