The end of the year is a good time to check how much you've put into workplace retirement plans and individual retirement accounts. Contribution limits and timing rules vary by account type, and some contributions must go through payroll before the final paycheck of the year.

If you received a raise or have room in your budget, consider whether to increase your contribution rate, even slightly. If your employer offers a matching contribution, find out whether you're contributing enough to receive the full match. Your human resources department or plan website can show where you stand.

Retirement contributions can also affect your taxes, depending on the type of account. Because the rules are detailed and depend on your income and situation, it's wise to talk with a tax professional or financial advisor before making large changes. Setting your contribution for next year now also means one less thing to handle once the new year starts.