The best time to start planning for retirement is always "now". However, if you're in your 20s, you're probably either in or fresh out of college and faced with a lot of instability. If you're able to start investing in a 401(k) or other retirement plan, it's always good to do so sooner rather than later, but as finance blog Wise Bread suggests, it may not be in your best interest to sacrifice the short term for the long term. More »