The main thing I always remember is that most likely the next card is a ten.
Since 10, J, Q, and K are all a value of ten out of 52 cards
16 are worth 10
while only 4 are worth 1, 2, . . . and 11
You can do fairly well with this strategy. For example if the dealer has a 3 showing you can assume he will have a 13. He will have to hit and most likely bust wth a 23.
When the dealer has a 3 showing you play conservatively. There is no reason to hit if you may bust as long as someone at the table has better than 13 which will then force the dealer to hit.
I have always had fun with this strategy.