I don't know how smooth the average 3/6 player is where you are, but here there seem to be 3 ways to put out bets and raises:
<ul type="square"> [*] Count out the chips s l o w l y, then put them out all at once
[*] Grab random number of chips, put them in, then add/remove chips to make bet
[*] Grab most or all of a 20-chip stack, drop in desired number of chips, then remove rest of stack[/list]The last thing 3/6 players are going to notice is how good/bad you are at getting chips into the pot.
Edit: I forgot the fourth way, which is a variation of the second: Grab random number of chips, put them in, wait for dealer to tell you whether you're short/over.