Is this a bad habit? do i need to give it a break?

I use my itouch for everything. i use it all day at work to listen to pandora or use my calculator. i use it for facebook, twitter and games on my break. when i get Home, i use it for eemail & memebase to relax. then i use it before i go to sleep to read manga, yahoo! answers & memebase. i am literally using it all the time, for everything. do i need to take a break from my itouch for a while?