4. Miscellaneous deductions. If you itemize on Schedule A of your 1040 — and don't take a standard deduction — there are a bevy of expenses you may be able to deduct. Grab your receipts and see if they exceed 2 percent of your adjusted gross income. If they do, you've got a deduction for the amount above that level.
Here are some popular items to tally up: Dues to professional societies; home office expenses (in an area used exclusively for your business); subscriptions to trade journals and professional publications; job-search expenses; work-related transportation, meals and lodging; and work-related education. See IRS Publication 529 for more details.
For IRAs, you have until April 17 to make contributions. Keep in mind that Roth IRAs and Roth 401(k)s tax your contributions, but withdrawals are tax-free. If you think taxes are going up — as many pundits predict — a Roth might be a good move.
6. Capital gains and losses. If you have a stock that's risen in value, this might be a good year to take the gain and get taxed at the 15 percent rate for long-term (held more than a year). The Obama administration has discussed raising the capital gains rate to 20 percent.
And do you have some losers you want to prune from your portfolio? For losses that exceed your gains, you can claim a deduction of up to $3,000 annually — $1,500 for married taxpayers filing separately.
7. Mutual funds. If you're thinking of buying into a mutual fund before the end of the year, be aware of the tax liability. Funds pay year-end distributions in December, so you may get hit with taxes on a fund you've only held for a few weeks. This is not a problem, though, if you make the purchase within a qualified retirement plan such as an IRA.
8. Energy savings. Making certain energy-related improvements to your home will cut your tax bill. For instance, you can get a credit of 10 percent of the material cost of qualifying types of insulation in your primary home, up to $500. Some of the energy credits, like that one, expire at the end of 2011. Get more info about 2011 energy credits.
9. Receipts and bills. Keep them. Gather them now, not next April, so you or your tax planner can get a heads up before the year ends. For a referral for a fee-only financial planner, contact the National Association of Personal Financial Advisors.
10. Direct deposit. If you're due a refund, sign up for direct deposit. You may not be saving on your taxes, but you'll have the satisfaction of getting your money faster.
For general tax information, the IRS has a number of free guides and forms online that can help. Also, check out AARP Foundation Tax-Aide, a free program that offers services to low and moderate income taxpayers, with special attention to those 60 and older.
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John F. Wasik is a personal finance columnist for Reuters and the author of The Cul-de-Sac Syndrome and 12 other books.