Learn the basic strategy by heart and follow it strictly, regardless of your hunch, and all signs. You should make the choice of tables and players after careful consideration. Your task is to find a nice table quickly with minimum interruption and without any foreign intervention.
Insurance, in fact, is a good tool for the dealer but not for a player. If you insure, the dealer gets more chances to collect blackjack.
If you aim to win in the regular game, learn how to properly manage your own money. Of course, putting everything on the line is not recommended. Start from a minimum amount at once after sitting down at the table. Spend no more than 5% of your total amount. So you can greatly reduce the risk of bankruptcy. If you're familiar with the rules of bankroll in other games, such as poker, craps, and boldly use them in the game.