Heres another good example of that point about knowing how you'll react to a raise if you bet or raise yourself:

Dont remember stats, but basic Taggy Reg.

No-Limit Hold'em, $1.00 BB (4 handed) - Hold'em Manager Converter Tool from FlopTurnRiver.com

Hero (SB) ($100)
BB ($125.50)
Button ($101)
UTG ($109.45)

Preflop: Hero is SB with 10, A
1 fold, Button bets $4, Hero calls $3.50, 1 fold

Flop: ($9) J, K, 7 (2 players)
Hero checks, Button checks

Turn: ($9) 5 (2 players)
Hero checks, Button checks

River: ($9) Q (2 players)
Hero bets $5, Button raises $13, Hero raises $51, Button calls $43

Total pot: $121

Results:
Button didn't show
Hero had 10, A (straight, Ace high).
Outcome: Hero won $119


Now he tanked his entire timebank down before calling. My point isnt whether his raise was good (although his call almost certainly is bad), the point is that his raise is bad if he hasnt already considered what he's going to do if I reraise. That should be decided, before (or as a part of) his decision to raise in the first place, not after I do it.