Poor Bankroll Management from the Start
This was my most common error. I’d put in money and just begin playing with no plan. A proper strategy means deciding on a loss limit and a win goal before you press ‘spin’. I didn’t do that. I’d often play until my balance was almost gone, or give back every penny I’d won. For a game like this, you need strict limits and the determination to stick to them. It’s what turns a dangerous flutter into a measured bit of entertainment.