g4 running slow

i got a dual g4 about 6 or 7 months ago and i love it
but latly it seems to be running slow when doing common things
i usualy have mail, safari, itunes, and aim running.... and when i do something as simple as open a few unsized pictures in preview everything slows down, and when scrolling through the pictures in the drawer it takes a while to go to the next picture...
and photoshop is running a bit slower it seems to
anything i can do to fix this?
im sure ram would help, but theres got to be something else because it hasnt always been like this

Have you tried rebooting the machine and running the maintenance scripts?

The first question wuld be how RAM do you have on your system?
Next would be how much available disk space do you have?
Next would be do you have any other application running that you have forget about?
Have you rebooted your system recently?

yes, i have rebooted it and it does the same thing....
ram, i have 768 mb, but im really thinking about adding more.. whats the best place to get some thats pretty cheap....
available disk space, 10.47 gb on a 80 gb drive......
no other programs running that i forgot about, unless somehow there hidden

As I mentioned before, have you run the maintenance scripts recently?

U could repair permissions!
That really helped my mac a lot!

BTW U might want to add another hard drive too.

For information on running the maintenace scripts see http://www.thexlab.com/faqs/maintscripts.html