Choose a counting system (commonly Hi-Lo).
Assign card values: 2–6 = +1, 7–9 = 0, 10–A = −1.
Start a running count at 0.
For each card dealt, update the running count by adding its assigned value.
When the deck count changes, convert running count to true count: True Count = Running Count ÷ Number of decks remaining.
Track decks remaining (including the current shoe position) for the true count.
Use an adjustment rule for betting and/or play decisions based on the true count (system-specific).
Keep a discard/remaining-card estimate accurate as cards are dealt.
Reset the running count to 0 when the shoe is reshuffled.
Practice with real or simulated deals to maintain speed and accuracy.
Use only legal, casino-approved methods and follow all applicable rules.