You have suggested performing a few maintenance operations that may improve speed. What would they be? Are they simple to perform?
Mac OS X actually does a lot of maintenance for you in the background. There are a few symptoms that require application of some basic clean-up, which can be done in the Terminal, or with a simple tool such as Maintenance (the same developer also makes the more robust OnyX, and there are several other similar packages, including Cocktail, Macaroni, Leopard Cache Cleaner, et al. The only times we have to use things like DiskWarrior, TechTool, or the like are when the Mac is barely functioning.