the first thing i would suggest is to buy a pack of construction paper from the dollar tree. not only is it great while you learn to use the machine( and cheap!) and save your "good" paper for later. but it is also a perfect weight for the mirroring option on the newer cards.
i too recommend a spatula, either brand is fine, and i have the "tweezer Bee" brand tweezers, they are awesome for removing the tiny cuts, as well as placing them on your project.
and i also agree with the others on getting a bigger glass mat. it is great when you do alot of cuts. save the 6x6 for when you are just making a couple qucik cute.