In my last 50yrs I've found drinking to be the be the thing that I understand most in this life. It's really easy - you drink, then you fall down (that's called rest), then you stop resting and start all over again.
Disclaimer:{all comments offered by myself in the making of this post have not been scrutinised by SWMBO and therefore must be considered invalid!}
I'm just about to fall down (I'm still on holidays) so therefore I don't care about the validity of my comments
Regards
Mark