PHYSICAL TELLS.

You're not playing online, there's soooooo much more information available. Some of those guys are loud and obnoxious when they have a big hand and quiet as a mouse when they are bluffing. I knew a guy who cut out his chips into two piles and clicked them together really hard when he was making a bluff. Trust me, if the guy is that bad, he's got tells. Read Caro, he might not have some of the tells in the book, but it'll get you in the right frame of mind to find his (and everyone else's).