When should we checkraise? When it accomplishes our goals. What does a checkraise accomplish? First, a high percent of the time, our opponents fold. Second, it bloats the pot. If you watch some of the "Biggest Pot Ever" hands, with the high-stakes and deep stacks, you can rest assured that every single one of them features a flop checkraise.
Checkraising the Flop
Playing Draws
Heads up games are the most aggressive form of poker out there. So, when you flop a hand with high equity, there's no point in playing it passively. If our opponents are loose and aggressive, this means that they will not often have strong hands. It also means that they might be capable of two-barrelling us on the flop and the turn. Finally, by playing draws aggressively, it leaves us balanced to play our monsters aggressively and still get action.