So lets say you lost power to your Xbox, power supply failed and you need to return it/send in for service or the power went out in the house and you have to return the game inside to avoid those nasty late fees!
The tools, a paperclip! The bigger paperclips work best. Straighten it out as below. (tape and label optional 
)
You will find a hole on all Xbox consoles at Arrow 1. If you stick your paperclip in that hole and it hits metal go on to point 2 (Phillips DVD drives)
Both Thomson and Samsung DVD drives open via the hole at arrow 1.
For Thomson drives you will find you need to insert the paperclip all the way until it stops, remove and repeat the process several times, you are manually spinning a gear so it takes at least six or so pushes.
For Samsung drives inserting it a single time opens the door but you have to push pretty hard as it is a lever action open.
Arrow 2, right at the very tip of the arrow you will see a hole, like the Thomson drive you are spinning a gear manually and will need to insert many times.
Once you have inserted the paperclip once/several times in hole 1 or 2 the door will start to come out, repeat until it is 1/2 to 1 inch out.
Once it is out far enough the tray can be pulled out easily, (never force it)
