401(k): retirement account through your job. Money usually goes in before taxes, and a lot of jobs match part of what you put in — that match is free money, so don’t leave it on the table.
Roth IRA: an account you open yourself. You put in money you already paid taxes on, and qualified withdrawals in retirement come out tax-free.
The limits and income rules change, so check the current numbers with the IRS or your plan before you move.
Your turn: which one are you using, how did you start, and what do you wish somebody told you at 22?
Nothing here is financial advice. Do your own research. We’re here to laugh, learn and get paid — in that order.