on mastery

There are two other major elements researchers have found when it comes to attaining mastery. They are, famously, 10,000 hours of deliberate practice, and an experienced mentor. 

opp modeling

"When you are observing your opponent, try to pay attention to every spot, and consciously try to generalize what that spot tells you about his play in general. That is, look at specifics, and try to see how they fit into the overall pattern of his strategy or tendencies. Again, this does not happen automatically – or if it does, it does so very weakly. Force yourself to actively and thoroughly process all of the information you’re receiving – to notice it, interpret it, and update your mental model of your opponent.

One of the best ways to do this is by talking through it (either aloud, or in your head). For example, if you see someone is checking back lots of draws on the turn, tell yourself “he is checking back lots of draws on this turn, which means he’s fairly risk-averse, he’s not semi-bluffing much, his range is strongly weighted toward value, I should be willing to put him on draws by the river,” and so on."

equity vs playability

playability (as i understand it) is still a function of equity and the playability of a hand changes dramatically based on what board textures your opponent attacks or gives up on. Of course preflop equity matters, but it's a combination of that and how much of that equity you expect to realize over the course of the hand.

regs like to bet/fold

"How do you identify bet-fold situations, besides the fairly obvious example of the player who raises a wide range preflop and then continuation bets all of the air?

It requires some hand reading skills.

You’re looking for situations where your opponents have a fairly weak betting range. One easy way to spot these situations against some TAGs is to use bet-sizing tells. Remember that many players will make extra-large bets on the late streets when they have a monster. Therefore, when these players don’t make a large bet, their betting range is weighted more toward weaker hands."

Internet on blinds defense

"i dont have a fixed answer, but you also need to take into account relative skill as well. For example if someone barrels 100% it's really easy, just see your flop equity + pot odds vs his range and then call 3 streets. Same goes for someone who is always checking down.

For someone with very good aggressive frequencies you should expect not to get to showdown that much. I think you would need at least 50-100% more pot odds than fold equity vs such a player.

You also need to think about playability of your hand. For example 94o has 36% equity vs an 80% opening range. But since playability is so poor you probably don't even get to realize your equity half the time. And if you only have 18% out of 36% equity, you can't call a minraise cos you get 23% pot odds.

On the other hand, with 96s you have 43.6% equity. Assuming you can realize at least 60% of your equity due to the playability of your hand and assuming you don't get owned by your opponent, you would have like 26% equity which is enough to call a minraise (23% pot odds).

It's quite difficult to quantify everything but you could try to "
...

"comparing K2o equity monster but playability trash to 75s equity trash but playability monster

K2 equity comes from Khi which is usually in the bluffcatcher region and tough to play, hence bad 

playability75s equity comes (at least more so than K2o) from straights and flushes which is usually in the nuts category and awesome to play. (and draws to those, that is better equity to play with because it turns into the nuts sometimes, rather than Khi equity, which turns into a river best hand Khi sometimes)"

truth

Deliberate practice is the key. This is the kind of practice that hurts. It's intensive, focused on making tiny step-by-step improvements in a very narrow area of one's game. It's uncomfortable, where you force yourself to target a specific skill that is just a micro-step beyond your current abilities. You are forced to slow down, make errors, and then correct them. That's how you get better.

too good

http://forumserver.twoplustwo.com/101/coaching-advice/systematic-training-drills-nlhe-1107105/