When life gives you lemons, chuck them at people you dislike.

I'm beginning to discover that an integral part of growing older and more experienced is learning to embrace disappointment.
In fact, the big part is determining what is worthy of the term "disappointment," and what isn't. There are a lot of situations that you may find yourself in that aren't ideal, but not threatening. They may even be partially your fault…the occasional lapse of judgement, flighty, light-headed mistakes, "holy-shit-the-world-is-out-to-get-me-and-it's-gaining-fast" days…general irresponsibility commonly practiced by 20-somethings living their life in the fast lane for a change.

Learn to embrace those scenarios. I'm not advocating that you make idleness a habit, or using the excuse "I'm young, wild, and free" as your trump card to get away with murder, but the occasional stupid mishap is all part of traveling the road of life.
You don't have to be a hellbent rebel without a cause, but I'm sure at one point, a U.S. president cut a college class because he partied a little too hard the night before and missed his alarm, Buzz Aldrin or Neil Armstrong made up a lame-ass excuse not to go to a family reunion, or Gandhi didn't text that one girl back, because frankly, he lost interest.

I once explained to someone that this is the one time in your life when you have all of the independence in the world, but none of the responsibility. It's the only chance you get to be selfish--nay---are expected to be selfish--and it's without repercussion.

Sometimes it's okay to throw your goody-two-shoes to the wind. If you're a generally decent human being, there'll be the side effect of guilt and disappointment: disappointment in yourself, in the situation, in the astronomical phases that allowed such events to take place…but eventually you'll learn not to sweat the small stuff. You may even puff out your chest a little and wear the "I'm a badass" badge for a while.
Or, if you're like me, the little voice in the back of your mind will preach balance, and you'll move about the rest of your day feeling indifferent, yet satisfied that somehow, you've done something right.