Housekeeping for Macs

[Denise Williams]

Hi All
My G4, running OS9.2 is becoming VERY SLOW & I'd like to know what is best
to do to in the way of 'housekeeping'. I regularly zap the P Ram (and hold
down for at least 4 pings) and I also rearrange the Desktop. What else can I
do? How do I delete cookies? And yes I am using huge photo files all the
time. When going into 'About this computer' I have 832MB of built in memory
and Photoshop's blue bar is almost full, at 293MB. Should I allocate more
space to Photoshop? If so, How?
TIA
Denise