We don't always make the right choices when we're young.

It's especially true with our money, since we probably don't think about how our split-second decisions can impact our lives later on.

I am guilty of these kinds of mistakes myself — wasting money on things I had no use for, not taking advantage of all the "free" stuff my school offered, and ultimately not thinking about life after college — which led to some poor habits that kept me from building wealth in the year I've spent post-grad.

But, I'm not alone.

I reached out to my friends to see if they had any money mistakes they wanted to share, and what they would have done differently. Just like me, many of peers weren't always as financially savvy as they wanted to be in the years after college, and have also made some poor money decisions.

Looking back, here's some advice they would have given their younger selves about money before they entered the real world: