First, some background on villain - a couple of orbits ago, a new player just sat down to his left and this hand occured -

Ultimate Bet
No Limit Holdem Ring game
Blinds: $0.05./$0.10.
5 players


Stack sizes:
Hero: $19.39
CO: $9.27
Button: $11.72
SB: $13.48
BB: $10

Pre-flop: (5 players) Hero is UTG with
Hero folds, CO calls, Button folds, SB calls, BB raises to $0.4, CO calls, SB calls.

Flop: ($1.2, 3 players)
SB checks, BB bets $1.2, CO folds, SB calls.

Turn: ($3.6, 2 players)
SB checks, BB checks.

River: ($3.6, 2 players)
SB bets $1, BB raises to $6.6, SB folds.
Uncalled bets: $5.6 returned to BB.

Results:
Final pot: $5.6

BB showed his 96o and villain spent the next orbit chewing him out - he was very ticked at getting bluffed out of that pot.

Then, this hand comes up.

Ultimate Bet
No Limit Holdem Ring game
Blinds: $0.05./$0.10.
5 players


Stack sizes:
UTG: $11.88
CO: $10.65
Button: $7.81
SB: $12.12
Hero: $18.94

Pre-flop: (5 players) Hero is BB with
2 folds, Button calls, SB folds, Hero checks.

Flop: ($0.25, 2 players)
Hero checks, Button checks.

Turn: ($0.25, 2 players)
Hero checks, Button bets $0.1, Hero calls.

River: ($0.45, 2 players)
Hero checks, Button bets $0.45, Hero raises to ???? (Villain has about $7 behind)

Given what I've seen so far, I don't think he's betting the river with air, and he's probably ready to snap off another bluff if I can make it look like one.

If you feel you have a read on someone, go with it sir!

The best way to improve such things is to give it a try...

At the micro limits, shove with the nuts is often a very profitable play.