I'm sure I'm not alone here, but I often use my betting time as a deceptive tool when slowplaying. For example, if I flop a monster in LP and an EP bets, I will let my time run down to make it look like I am struggling with whether to call. A weaker player who does not know me at all will almost always think they can then steal the pot (or even value bet) with a bigger bet on the turn or river. If they make a small bet, I will either reraise the turn or river, depending on the circumstaces. However, a more sophisticated player will not always be fooled by this move, as it is quite common and obvious a lot of the time. Against a weak player, I think this is one of the most effective ways to use betting time deception to your advantage.