I don't want to come off as insensitive, so I'll try to phrase things carefully.

If you have even the slightest spare money per pay period, like $30, and a 401k or 403b is offered to you, you really need to do it.

That money comes out of your check before taxes, so you will be investing more money than what actually comes out of your check. By deduction 6% of a $15/hr full time job, you're putting in $36, but your paycheck will only go down about $30-free money!

Many places will match you some, say half of that first 6%, so now you're saving $54 while only being out $30. You've almost doubled your money in one week!

Come tax time, you've saved $1872, and you've been given a free $936. It doesn't stop there though, because now you only are paying income tax on $29,328 instead of $31,200. If you get a tax rebate now, you will get even more back!

So now you're saving $2808 a year at age 20. Let's put that in one mutual fund, a SP500 index fund. Over the last 10 years, that has returned 12‰, but let's be conservative and call it 10. If you never make a cent more per hour, by age 65, you will have saved $84,000 and your job has chipped in $42,000, over a year's pay! But with that 10% compound interest, you have $2,000,000! You are a multi-millionaire for $30/wk!

If you get a raise or get a better job in the future, this number can be even higher.

Please keep this in mind. Even if you can't do it now, do it ASAP. Here are the same numbers, but starting at 30 instead of 20.

Still amazing, but seeing this difference is why we older on ones tell you not saving earlier was our big regret.

I hope this was helpful and doesn't get taken as a "pick yourself up by your bootstraps" thing.