They'll count toward the number of permanents shuffled into your library, so you'll get a card back for each token you owned
Many staples have power 2 or less
Whenever another player attacks with two or more creatures, they draw a card if none of those creatures attacked you
Generally, for example, you may want to take Time Counters away from Suspended spells (unless you want to delay them longer), but you may want to add Time Counters to a card with Vanishing to make it stick around longer
I also decided to foil out a few of the cards I was ordering, so I just clicked the FOIL IT box on the user interface: You get a choice between two different types of foils
It is, to put it lightly, ridiculously efficient