Updating My Computer

My computer is now more than 2 years old. I got this for my birthday last 2008 and I am still using it up to now. I paid too much for this computer as I added more software that I thought can help and be useful with my online work. But anyway, since it's already more than 2 years old, I am now planning to do some updates like getting a new computer memory, latest mouse, new battery and other accessories. Hum I just can't wait to experience using my updated computer soon. Just patiently waiting for all the parts and accessories I ordered online. Hope it will arrive faster with out any problem at all.