I suppose I'm a mild "geek" with my Macs. I like to keep up on maintenance procedures, etc. I see various "utilities" for X that perform various tasks, such as Cronation (to run Cron tasks- is this necessary?), Spellbinder (to update prebindings- is this necessary?), and others. I find these all interesting, but am I wasting my time using these just to try to squeeze out every ounce of performance, or are these truly necessary tasks for OSX stability and reliability?