1.
I was reading davsimon's articles about pre and post flop play and also the 19 playable hands article, but I seem to only get these hands maybe 1 in 20 hands.. am I seriously only meant to play 1 in 20 hands?

2.
I understand the concept behind estimated value, but how do I work out an exact value for it? Is it practical to work out mid-hand where you only have 20 secs to act?

3. Was trying to find details on folding equity.. I'm still unsure of what it is.