A few weeks ago, my toddler would take his frustration out on his toys by throwing them.  Some of these toys are rather heavy, so it became quite a hazard.

So we wrote "NO THROWING" on the side of a plastic tub. Every time he threw a toy or other object, it went into the tub, which sat on top of the entertainment center. He didn't get his toys back until the next day. He learned pretty quickly not to throw his toys.