An often under used perc piece is the Shaker.
I have a couple that I use, one is an old plastic ballcock filled with Arborio rice (uncooked) and the other is a Meinl percussion live Red - it's design makes it easy to get the feel and keep in time.
I use it in quiet sections to keep the rhythm going, where drums or bass are not present.
typically it's stick a Waves Aphex Aural exciter on it to make it jump out, but keep it low in the mix, and possibly the Plugin Alliance Stereomaker to widen it and keep it out of the way of what's going on in the middle.
Hope it helps...