RAM is the lifeblood of your computer. The more you have, the more you can do. Simply put: acquire as much RAM as you can afford.
Modern operating systems such as Microsoft Windows XP and Apple Mac OSX require much more RAM to run effectively than older operating systems.
The following software categories need as much RAM as possible for optimum operating:
Video editing software
Graphics software
Photo manipulation software
Compositing software
3D modeling and rendering software
Multi-track audio editing software
Notes: Please double check your specific RAM needs (type, speed, physical configuration) with the manufacturer of your computer.
Notes: Please also be extra sure that there is actually physical space on your computer's motherboard for additional RAM.