Can anyone here give me a few performance tips for a Windows 2000 system? I tried searching google for some tips, but they all seem geared for particular performance issues like video or audio. I'm looking for some general performance tips to help increase speed a bit. The person using the system has noticed a pretty major slowdown building up over the last 6 months or so. Here are the specs:

Dell Laptop
PIV 833
256MB RAM
15 GB HD

I've removed all the annoying TSR's (like winampa, realplayer startcenter, etc) and I've scanned the task manager for any blatant resource hogs. Anything else I should look for? Any advice for paging file size?