How can I efficiently pick up bricks off the floor?
I actually have somewhere a special Lego picking up device. It has two wheels on the sides and when you slide it across the floor, these turn an attachment at the front. The attachement is basically like the thing on the side of a paddle boat, but taking up the whole width of the front, and it throws the lego pieces into the back of the device as it turns. It works marvelously on carpets!

Edit: It's a Brick Vac.