Logging out when finished-make sure you log out when your finished in case the next person to go on that computer could see/use your information and details.
Clearing your internet history-clear your history in case someone clicks onto a website and uses your profile and takes details.
Restricting viewers/friends-Make sure when you set it up you put security on so no one can see information like where your from. and to make sure you have to confirm someone so strangers dont add you so your not in danger of pedophiles and abductors.
Making people authors-letting people that only you know see your work and how youve been doing in the process and protects people from copying or using your work.