My Mac hard disk got really fat and full, it was disgusting. This problem is happening to many people who have bought the original MacBooks. They are feeling the distinctly tight pinch of a small hard drive. I bought my macbook ~2 years ago and it came with a 60Gig hard disk, clearly not enough for our information-dense age. I quickly filled up and had to erase and re-erase old information. I lost an entire instructable after erasing a folder of pictures to make room for more.
Here's how I upgraded my hard drive to 320 Gigs while upgrading to Mac OS X Leopard and installing Time Machine. All while keeping all my old applications and data safe.
If you follow these instructions:
Your past work will be fossilized .
Your present work will be preserved..
And your mac will become a spacious palace to contain all your work.
For the amount of an upgrade you will wind up with the ~$150 price tag is pretty small. I had been deleting things every day trying to make room for daily activities. I'm now making many more videos and my programs run without "clogging up" by filling scratch disks.
Here's what you'll need and the links show you where you can find them: