There really is an easy way to do this, though it's already been said many times before. Simply let publishers know with your wallet what you'll accept and not accept. I buy EA games when they don't screw me over. I bought ME3 used, but I bought SSX new... because one had DLC practices I liked and the other didn't. I don't buy Ubisoft games on the PC period. I haven't bought a Final Fantasy game since 12, but I bought Sleeping Dogs and Deus Ex: HR because those were good games that Squeenix had other developers make. Capcom is virtually dead to me, but I'll buy Okami HD just so they know that's the last thing decent they published. And I haven't bought anything from Sega since Valkyria Chronicles since they've shown they can't make and keep an IP to save their life save perhaps Total War, and a dev they own makes that instead.
Again, never say you'll boycot... because hardly anyone ever perseveres enough to stick to it. Buy what's good, buy what's fair, and let everything else fester as a signal to all publishers concerning what you're willing to put up with.