Start with the rules.
For blackjack, check deck count, payout for a natural blackjack, and whether the dealer hits soft 17. For roulette, a single-zero wheel is generally preferable to a double-zero wheel. In baccarat, look at commission and any altered payout rules. For craps, check the maximum Odds allowed and the exact payouts before placing a wager.
Know the product.
Real-money casinos, social casinos, and sweepstakes platforms operate differently. Read the terms, understand eligibility in your location, and know exactly what can be redeemed before participating.
Set your guardrails first.
Use deposit, loss, and time limits where available. Never borrow to gamble, chase a loss, or treat casino play as a way to make income.