Just another small point or two
1. Always save your work before you send it to print, not the other way round, the print command can do strange things sometimes, and this will mean you will not loose the work.
2. Keep cats away from the keyboard - my daughter lost one of her undergrad essays when the cat managed to delete the lot.
3.Keep a backup copy of all your work, at one stage I had work on two computers, a memory stick and a CD - just in case - oh, and a printed out copy.