Bit of a dumb question I know, but hey, this is the newbie forum so... how do you back up your maya projects?

Really looking to get this answered from all possible angles...

Do you compress your files? What do you save to - DVD RW? How do you clean out your maya project folders to make them smaller? Do you delete all your IPR and other rendered images? Do you save your crappy animations in a seperate folder to make your files smaller? Where do you save your photoshop files - not the textures, but the actual PS files? (my photoshop is storing them under my images folder).

Is there anything else I need to be thinking about or other tips or tricks you can recommend?

Again, sorry for the dumb question, but computers and me are like chalk and cheese...