To much Info!!!!
better screen before you post!
When you share things like a picture or post make sure it doesn't get posted all over the internet especially something private if it is something like that only share it to close friends who you know aren't gonna post it every where
Another thing to watch out and make sure of is your location! If and app or something asks for it say no! you don't want it posting it places or anything like that you never know what its gonna use it for
Check your privacy setting often and change your passwords every couple of months. You don't want your accounts hacked to use it to post lots of inappropriate or embarrassing things
And screen before you post make sure whatever your posting you would have no problem with your grandmother seeing if you do its probably not something you should share