Concerning the bet sizing, bet more on the flop and on the turn. Passive villains at the micros don't fold draws, especially not flush draws. This bloats the pot with a strong hand. The final pot will be much bigger. Say you bet 80% pot on each street: the pot on the turn becomes $.39, the pot on the river becomes $1.01, instead of $.69

Also try to be consistent with your bet sizes. If you bet small to extract with your strong hands and big with your bluffs or weaker hands, it won't go unnoticed and you become very readable. I like 3/4 pot heads up most of the time for both my c-bets and value bets.

Finally, it is not sufficient to bet just enough to slightly deny drawing odds to your opp. You have to bet more to compensate for reverse implied odds (for example when you loose your stack when he hits a well concealed draw and you don't notice it or you believe it's a bluff but it's not or you think you have the best hand but you don't). 2/3rd to 3/4 pot is a good "default" size heads up, should be more in multiway pots. This is very well documented in Sklansky's book "No limit theory and practice" and in some articles here and on 2+2. Search for "bet sizing" and "reverse implied odds".