Despite how tech savvy you are, there are certain things every one of us has to deal with when using a computer—and we don't always deal with them in the most efficient ways. You should learn to keep your computer fast, safe, and easy to use.
check TIP 1:
http://answers.techzim.co.zw/12173/tip-simple-things-that-every-computer-user-should-know-how-do
2. Keep your batteries basting as long as possible
To run out of battery on your phone or laptop can be pretty frustrating, but luckily, you can do a lot of things to keep it lasting longer. Your laptop(computer) or phone has a lot of built- in power settings that can come in really handy, and there are a few tricks on both and Android and the iPhone, that will economise some extra time out of your battery. And, if you want your battery to retain that life, make sure you know how often to charge it to keep it alive in the years ahead.