Stepping out of your safety zone

Stepping out of your safety zone is the most effective way to improve when it comes to drawing. "What do I mean by stepping out of your safety zone?", I mean to work on something you're not good at, and keep practicing on it.
For example, I suck at drawing hands (i manage to do so sometimes, but other times, it just looks terrible), so I'll keep drawing hands, maybe draw a whole sheet on just hands, until I can do it efficiently.
Remember, Practice makes perfect! and start stepping out of your safety zones!
Good luck!