Baited breath, instead of bated. I know, it's really common, but it just brings up an image of someone whose breath smells like worms.
Love this poem though, by Geoffrey Taylor. I think it's the only place where "baited" would be the correct spelling.
Sally, having swallowed cheese,
Directs down holes the scented breeze,
Enticing thus with baited breath
Nice mice to an untimely death.