I have Noticed
That some people seem lost about what their computer is capable of.
To begin with a computer is the most stupid machine in the world, it only tells you what it has been told by others, ie, questions, equations, how to, etc but it can do it faster than you can so dont be afraid to ask it questions which you need answers to about the computer itself.
Your computer works better if you maintain it properly and clean its insides, no, not with a feather duster but using the tools that the computer has built into it for your convenience.
Do not be afraid to look into what your computer can do, as long as you do not use the 'DELETE ' button (unless you fully know what you are deleting) then you can do no harm.
Use your Help and Support program to check things out, if what you want to know is not there then Google it.
Two useful places to visit if you are not sure how you maintain your computer.
http://www.thexlab.com/faqs/maintainingmacosx.html
http://www.helpbytes.co.uk/maintenance.php
Failing this then post a question here and someone will tell you the answer but remember someone telling you something only stays in the memory for a short while, you reading something and doing something stays in the memory a lot longer.