IS THERE ANY SIMPLE WAY TO RETURN SPEED PERFORMANCE TO FACTORY SPEED AFTER ABOUT 3 YEARS OF RELATIVELY STANDARD USE?

Everyone is often so quick to bash all these 'cleaning' utilities but rarely give any solutions.
There's a lot of critiques and endless lists of what NOT to do to avoid performance problems.
My Powerbook is 3 years old. It runs like molasses... SLOW.
I'm not a computer geek, but I'm smart and understand quite a bit more than a newbie.
Do I need a degree in computer engineering to fix/speed up my mac?
Yes, I know, the cleaning utilities suck. But is it really true of all of them?
I'm not totally convinced because there seems to be such a huge market for them.
Sure, there's a huge market for bottled water too, so maybe they are just useless/marketing crap, but I really want to return to my original speed performance quickly and can't seem to find out if it's possible with a utility.
I'm not willing to sit down for 3 hours and study line by line b.s. about how to fix it.
I have no problem if it's not fixable. I've always assumed operating systems outgrow their hardware's capacity to keep up, and sell my old one for a new one, no prob.
I don't care, really, but again, I'm curious if there is any quick, easy, user-friendly utility or method that I can use to return the speed performance I had as recently as a year ago? (I'd be satisfied with that).
Anyone willing to bite on that? Anyone willing to not critique, complain, tell me what NOT to do and actually know a solution?
IS THERE ANY SIMPLE WAY TO RETURN SPEED PERFORMANCE BACK TO (OR CLOSE TO) ORIGINAL FACTORY SPEED AFTER ABOUT 3 YEARS OF RELATIVELY STANDARD USE?
The only thing I may have done outside of the norm was some video editing, but very little.

Look for solutions here:
https://discussions.apple.com/docs/DOC-3521
https://discussions.apple.com/docs/DOC-3353
Ciao.

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