MotW for the feats (and uses) and a few spells. S&S for the traps section and the last chapter (flanking, I think it was).
Whoever said DotF is good for paladins is right on. I used it when I played one, however it didn't do a whole lot for my cleric (apart from a spell or 2). S&F I haven't played that much with and the same goes for T&B. I only tend to use the splatbooks when I play as a PC and I have been DM-ing more recently...