I think the best upgrade you can do for your computer is to replace its conventional disk drive with a Solid-State Drive (SSD). Particularly so on a notebook or or netbook, since conventional disks on them tend to spin slower. I started looking at SSDs last year. The price then was still prohibitively expensive. But at the end of last year, I managed to snag a pretty good deal on an excellent performing consumer grade SSD. It’s the OCZ Vertex…