Roth and Traditional IRAs - $4,000 for 2007 (increased to $5,000 for 2008) plus $1,000 catch-up if you are age 50 or over by the end of the year.

SEP IRAs - 25% of your wages (or up to 20% of your net earnings from self-employment) up to a maximum of $45,000 for 2007 and $46,000 for 2008. Contributions can be made up to the employer's tax filing deadline, including extensions (if you are self-employed, you are the employer).

SIMPLE IRAs - $10,500 salary deferral plus $2,500 catch-up if you are 50 or over for 2008 plus up to 3% of your salary matched by your employer.

Profit Sharing/401(k)s - $15,500 in salary deferral for 2007 and 2008, plus catch-up deferral of $5,000 if you are age 50 or older by the end of the year plus 25% of your wages (or 20% of your net earnings from self-employment) up to a maximum of $45,000 for 2007 and $46,000 for 2008 (excluding the catch up contribution of $5,000).

Coverdell ESAs (formerly Education IRAs) - $2,000 per year until the child is age 18. 
Health Savings Accounts (HSAs) - $2,850 for individual coverage in 2007 ($2,900 for 2008) and $5,650 for family coverage in 2007 ($5,800 for 2008) plus $800 catch-up for 2007 ($900 for 2008) if you are over age 55.