1) Having someone observe your play is immensely helpful as it allows you to spot small leaks that you don't know about.

EX. 1: I am fairly tight 13/10. But, I would call 55 and lower in the blinds to any raise that was 12x less than the villains stack. This is bad at full ring, because being out of position, it is unlikely that you will get 2 streets of value even when you hit. Further, I was calling the raisers in SB, which in theory allows the BB to make a squeeze play that I would have to fold to.

2) In 3-bet pot allow your villain to make a mistake.

Before coaching my normal line would be to bet the shit out of this flop. As there is ZOMG flush draw. But by doing this I don't allow KK-JJ to make a mistake which is likely in his range.

PokerStars No-Limit Hold'em, $0.25 BB (9 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

MP3 ($26.35)
CO ($24.40)
Button ($25.05)
SB ($24.75)
BB ($25)
UTG ($25)
UTG+1 ($14.80)
MP1 ($25)
Hero (MP2) ($25)

Preflop: Hero is MP2 with K, A
3 folds, Hero bets $1, 2 folds, Button raises to $3.50, 2 folds, Hero raises to $7.50, Button calls $4

Flop: ($15.35) 8, 7, A (2 players)
Hero checks, Button bets $4.75, Hero raises to $17.50 (All-In), Button calls $12.75

Turn: ($50.35) J (2 players, 1 all-in)

River: ($50.35) 5 (2 players, 1 all-in)

Total pot: $50.35 | Rake: $2.45