Basic Strategy is the first step to beating blackjack with card counting. Soft 16 (A, 5) doubles against dealer 4 through 6, otherwise hit. There are also slight variations in strategy when you play a 6 deck game versus a single deck game.
Below I have listed the basic strategy rules for single deck games and for blackjack game or simply a deck of cards, you MUST learn basic strategy to SINGLE DECK - BASIC STRATEGY Your Hand vs Dealer's Upcard 8 Double on 5 to 6.
Basic Strategy Changes: 12 vs 3 = Stand; 16 vs 10 = Stand. Exceptions: 12 2+6) vs 3 = Hit; 12 5) vs 3 = Hit.