Lose some of the processes.
Memory has gone up recently. I put a 128MB DIMM in my old machine (233mhz!) for about £30. Its now closer to £40. I got it from
http://www.special-reserve.com/ - has an outlet near me.
Its frightning how much memory/disk/cpu modern O/S's need. I was once upgrading a company fileserver from 170MB to 300MB of HARD DISK! Graphics cards will soon have this much RAM on board.
I still think it was a mistake when you could no longer fit your OS, applications and data on the same 360K floppy for your 8mhz 8086 which would boot and load Wordstar 10 times faster than you can boot and get into Word on any Pentium system. The things we put up with in order to have a screensaver and animated cursors.