Mistake.

Find me one person who hasn't and doesn't make mistakes and I'll show you ultimate perfection.
Everyone, in the world, EVERYONE makes mistakes. I really can't re-iterate that enough.
If you made the mistake, or someone else made the mistake.
REMEMBER, at the end of the day we're all human and we all make mistakes. All of us make mistakes. All of us. Everyone. Even those you might deem as 'perfect', yeh they make mistakes too.

Mistake - A wrong action attributable to bad judgment or ignorance or inattention.

A wrong action, pretty simple definition. Caused by your bad judgment, ignorance or inattention.

Your bad judgment, contributes to a lot of things usually mistakes. Bad judgment is a weird thing though. Your judgment can be affected by a fair few factors.
1. Emotions.
2. Drowsiness.
3. Alcohol.

Emotions, radical emotions are a bitch. They affect everything in your life for a short period. Your mood controls your day, your year, your life. Drowsiness, being tired changes your judgment and your motor skills strangely enough. Then there's alcohol, which takes the last 2 and totally and absolutely destroys them and makes a whole new version of bad judgment. I'm not saying don't drink. Go for it, you only live once. But remember how much it can affect your judgment and learn from your past mistakes. Learn from other peoples mistakes too, you don't have time to make them all yourself.

Then again you've got to look at the other side of things, a lot of the time someone is hurt or offended because of your mistake. If you're the one hurt, you need to remember as well that people make mistakes and think about how much you would want someone to forgive you if the situation were in opposite. You make mistakes, so do they, be forgiving.

If you are forgiven, don't beat yourself up about it. What good does it do? Shit all. If you are forgiven be happy, tread lightly, but don't punish yourself. It doesn't help, it makes stuff harder really. You need to forgive yourself.

So really a mistake is a wrong action attributable to bad judgment or ignorance or inattention. But because that's so freaking confusing.

Mistake - A wrong action caused by bad judgment usually affected by outside factors.