If you want to win the "biggest refund game" with your friends, you'll have to decrease your withholding exemptions on your W-4. I, personally, am not in favor of giving the IRS a tax-free loan out of my paycheck, but I know a lot of people like to do it. Anyway, it's not your refund that matters in the end, but how much you are paying. The best game is to get your withholding exactly right so that you don't give them that loan, and you aren't socked with a big bill, and perhaps a penalty, in April.
You can't do much about the taxes unless you change your income or deductions. We try to manage ours down by contributing to our 401-Ks and using flexible spending accounts. Donating to church helps too. Granted, none of these put money in my pocket today, but it makes me feel good about the tax situation. I really feel that what we pay is a bargain for what we get (national security, etc...)
If you don't get the child tax credit now (baby born this year, etc...), increase your withholding exemptions ASAP to increase your paychecks for the rest of the year. Just be careful to do your analysis so that you don't underwithhold.