Though still expensive, SSDs became much more affordable lately, so you may consider buying one to speed up your computer's I/O operations dramatically. I have installed a few high speed SSD from macsales.com
so far and I'm very happy with them, but if you prefer any other brand, go for it, this instructable is going to be the same for all.
For this procedure all you need in terms of parts is the replacement SSD only. I will talk about tools in the following slides.