Some of this is personal preference though:
-I NEVER Double Down. (I don't trust the double down when it's 11 theory, because I always end up with low cards when I get an 11)


-14 & below: Hit
-15 & 16: Hesitate, perhaps use your cheat.
If you can't use your cheat, look at their revealed card:
If it's a 10 or face card: Hit. Chances are they have higher than you.
If it's 7-9: This is really your choice, but personally, I hit if I have 15, stand if I have 16
If it's 6 or below: Stand.
-17 & above: Stand.

Those are the rules I generally follow, although sometimes I'll go against them when my gut tells me to do different. 3nodding