Blackjack Tips

Use your chips to keep track of the (side) count.
You can use clock notation to represent 0 (12 o'clock) through 11 (11 o'clock) and different colours to represent positive versus negative. Or you can use a single colour with clock notation running from 0 to +5 to clockwise and 0 to -5 counter clockwise (6 o'clock is not used).

Never drink alcohol while playing.
Alcohol can adversely affect your judgment and cause you to be more emotional and makes more mistakes.

Leave the game when you start feeling fatigued.
You only have a slight edge over the house and it doesn't take many mistakes to lose that edge. Players tend to make more mistakes as they get tiered.

Scout casinos for the most favourable house rules.
The house rules dictate your advantage and thus the amount of money you can expect to win in the long run.

Keep an eye out for casino promotions.
Casinos are always running promotions to keep players coming or to attract new players. Look out for promotions that work well into your advantage.

Read Blackjack Attack by Don Schlesinger. This book is aimed at the already practicing card counter who wants to take their game to the next level. Blackjack Attack discusses back-counting the shoe game, betting techniques and win rates, evaluating new rules and bonuses, statistical insights, the "Illustrious 18", the "Floating Advantage", team play, camouflage, risk of ruin, and more. It is an excellent blackjack book that no serious player can afford to be without.