my computer is running slow, how do i improve?

Can you attach your computer specs?

also

Apple Support Communities contributor etresoft wrote a very useful app to quickly gather certain system information that may help point to a cause of this problem. Go to his website, download and run EtreCheck:

http://www.etresoft.com/etrecheck

Post the output results back here ad we will try to help you work out what the problem is.

Cheers

Pete

There are so many models of MBP all with verious amounts of disk space and RAM. Without your telling us what is running slow for you, it is impossible for us to answer you.

Allan