Remember anyone can see anything you post online!!!
If you don't want something online don't post it then!!!
Make sure you don't put your personnel info on sites you sighed up for!!!
Bad people that are online try to get info out of you by lying and wait until you do tell them where you are!!!
Make sure you tell your parent or guardian what your doing online!!!
Make sure you have a good online protection system. (Examples I Predator, Avast and Norton)