What's a "backdoor" Roth? And what about a mega-backdoor Roth or sidedoor Roth? The answers — and the steps you can take to contribute. Plus, check out the "Term Time" section where we break down the finance industry jargon so you can contribute with confidence.

What’s the history behind 401(k) plans? And is it always a good idea to contribute or even max out your 401(k) contributions if a plan is available? Let’s take a look at the upsides — and four reasons why you might want to reconsider contributing to your employer’s 401(k).