I used to reality check about 4 times an hour or whenever something slightly odd occurs like for example vehicle outside house that isn't normally there, strange tv program, something in your house you have never seen before, family membr acting strange or differently to how they normally act, electrical appliance suddenly stops working (happens alot in dreams).

Basically i used to question nearly everything and it payed off, it resulted in many many dilds. I rarely reality check now, only if i think i actually might be dreaming.