i have a 60, and i find its not big enough. To save space, i recommend that you:
- re-install OS X, removing any languages, printer drivers, and apps which you wont need, like iDVD (if you only have a combo drive).
- put any large, but rarely used files, such as iMovie files, onto an external drive, like your iPod.
- delete movies from your computer if you have them on your iPod. (if you need to burn them to a CD, use a program such as iPodRip to get them off your iPod and onto your main drive)
- Clean out your home folders reguarly, deleting any useless items.
If you are still 10GB or less from full,
- Buy an external HDD
- just swap the one in your computer for a bigger one
Hope this helps
Lee