Well mostly I'll avoid connected type boards or boards that are likely to hit hands people will usually play. Paired up boards with paired and connected broadways are ugly because people will always play. For example a board like KKJ like you mentioned... Most people will usually play and call raises with hands broadway hands KQ, QJ, QT, JT, some people will even just call raises with AK-AT too. But a lot of times (for whatever reason) seems like most people, if they have any kind of PP are calling you down on paired boards, unless you really are firing multiple barrels. Learned that one from Semillion
So something like JJT again nails those types of hands... Now also consider out image as well, if we're doing nothing but showing down similar type hands (big A type or big K etc) we'll likely get credit for having a monster. Believe it or not and I've only been experimenting with this recently, I've been doing some delayed Cbetting on some scary looking flops with some success... Now it could just be that they have absolutely nothing as well but so far it seems to be going fairly well.
Flops like that can often fall into the "it depends" category, both on the player and how we might be viewed... Some times you can get away with things having a nittier image that you can't do if you look like you're LAGging it up.
As far as the other guy being a fish that's fine but even they pick up hands once in a while... Either way though I'm not sure if you are really maximizing much more there, if he's on complete air he'll fold the river to a bet anyway. If he will call down with anything you probably maximized by raising because if he had anything callable he would've called the with a 5 or anything remotely callable if he's that bad. Maybe just on a stone cold bluff?