How do I make customizations to a plugin

[absurdsmash]

I would like to add some new features to it. Of course I want to make sure I wont mess up anything; I still want to be able to update nodebb and stuff. Just makin' sure; whats the best way to do this? I could not find a guide for this,

Regards!

[PitaJ]

What plugin? The best way is to fork it on github.