I build my current PC about 2 years ago. I am reasonably pleased with it although i would like to have experiemented with Linux of other operating services on it. anyway I was getting slightly slowed down while runnign multiple programs so after 6 months of talking about It I bought some Memory.
I chucked in 3x 512MB ram to the available 3 slots taking me to 2GB Ram. Nice. this has speeded things up considerably.
anyway £100 odd paid by Visa to Crucial Memory.