Regardless of system tweaks upgrading the Ram and SSD will make your experience much better. I just did the following on an early 2011 13 MBP for my mom.
8GB DDR3 Ram - $40
256GB Kingston SataII SSD - $140
The computer is worlds faster all for under $200.
Check out newegg.com
8GB of ram is $30-$50
http://www.newegg.com/Product/Produ...32314 600032345&IsNodeId=1&name=8GB (2 x 4GB)
16GB of ram is $50-$100
http://www.newegg.com/Product/Produ...2314 600287035&IsNodeId=1&name=16GB (2 x 8GB)
SSD sales come up pretty often. I'd recommend the Samsung 830 or Crucial M4. The 256GB variety can be had for less than $200 if you do some searching. You can go a bit cheaper on the SSD, but most recommendations I've seen is to stay away from OCZ drives. The Kingston one I got was cheap but anything is better/faster than a mechanical HDD. 80MB read/write to 220MB read/write.
Is this the one you bought?
Crucial 8GB (2 x 4GB) DDR3 1333 Memory for Apple Model CT2K4G3S1339M
Looking to upgrade maybe in the future.. I want the 15'' MBP first though..