Re: double haul
In my early rookyhood, I read about the double haul, then spent about twenty years (really!) trying it from time to time with no success. Then finally something clicked. Now I instinctively double-haul on almost every cast. It has the great advantage of adding accelleration to every back- and forward-cast stroke. It's like a turbo-charger for your car engine.
Nobody should have to waste twenty years before acquiring this useful skill. Get instruction that works.