Where to keep cash on the sidelines?

[Ray S.]

Where does everyone store the cash they keep on the sidelines while you're waiting to put it to work? This would be money that I wouldn't want to risk losing. What would be the highest return available that provided the least amount of risk with the most liquidity? Aside from leaving it in a money market are there places you can put it that will at least make something, even if it's a small return? I usually stick it in bonds, but the bond market looks a little more risky right now. 

Thanks