I don't have an AUX input on my car stereo for the iPod, so I have to burn CD's to listen to in the car.
Here is my Playlist to do that:
Last Played is in the last 1 days
-- This makes sure something new is in the playlist
My Rating is greater than 3 stars
Play Count is greater than 1
-- Make sure the rating wasn't a spur of the
Time is greater than 1:20
-- Get rid of those annoying filler tracks
Genre is not Comedy
-- I want music only
Genre is not Classical
-- And I want to rock out while on the road
Limit to 79 minutes selected by random
-- Length of a CD
Match only checked songs
Now, I can burn a new CD every day and have it be different than the day before and offer a good random selection.
Note: The random aspect of this will break down if you just listen to an album, so you need another good randomizer playlist to listen to with iTunes/iPod. I find a modified version of the "iPod Personal Radio Station" playlist to be an excellent way to do this.