Trying to learn to raise for a free SD

[Eraserhead]

One thing I don't feel at all comfortable with and almost never use is the raise on turn for a free SD. Before this hand I hade read some about it here in the forum so when playing this hand the thought crossed my mind and I tried it. . From what I understand, raising for a free SD we do when (not all must apply):

1) we have a hand we want to SD,
2) we might fold out a better hand
3) we can fold to a 3-bet (?)
4) we can fold out a 6 or 5 outer in a relatively big pot

This is me semi-guessing, please flame away, any help would be gladly appreciated.

I had seen villian play 10 hands by this hand of which he folded 9 pre-flop. The one he went to flop with he checked in BB w J3o after UTG+1 limp, then c, c (on turn he got a flush draw J high), bet his flush which came in on river.

1/2 LHE

Your cards Q [img]/images/graemlins/heart.gif[/img] Q [img]/images/graemlins/diamond.gif[/img] [Hero on Button]

Preflop:
UTG folds, UTG+1 calls $1, CO folds, Hero raises $2, SB folds, BB calls $1, UTG+1 calls $1

Dealing Flop 8 [img]/images/graemlins/heart.gif[/img] 4 [img]/images/graemlins/spade.gif[/img] K [img]/images/graemlins/heart.gif[/img]
BB checks, UTG+1 checks, Hero bets $1, BB raises $2, UTG+1 folds, Hero calls $1

Dealing Turn 8 [img]/images/graemlins/heart.gif[/img] 4 [img]/images/graemlins/spade.gif[/img] K [img]/images/graemlins/heart.gif[/img] 5 [img]/images/graemlins/spade.gif[/img]
BB bets $2, Hero raises $4