Personal Finance Center
Contributing to tax-deferred retirement plans it a major component in any retirement savings plan; if you're over fifty, you can exceed the normal annual contribution limits.
For 401(k), 403(b), 457(b) and SAR-SEP plans, the catch-up is $5,500 in 2009. If you're over fifty, you can contribute up to $22,000. Simple IRAs allow an extra $2,500 in 2009.
Limits are likely to change each year; see a financial professional for annual limits − and catch-up limits − for future years.