PQ Mo•Bits is a big fat library of obvious everyday icons that a motion designer needs to keep handy. They're all pre-animated and customizable. Just search or browse the dockable inside After Effects and pop them into your project, use the controllers to tweak lots of parameters and BOOM: Massive time save.
Also working on a 1.1 update (free) with an aim to reach 200 icons.
Icons can be chopped and edited as you see fit. Shape layers are all preserved and editable.