Set personal limits before you play
The most effective responsible gaming habit is also the simplest: decide on your budget and your time limit before a single bet is placed. Not after a loss. Not in the middle of a winning streak. Before. Write it down if you have to. Once you have committed to a limit, treat it as a hard boundary, not a suggestion.
A reasonable gaming budget is money you have already allocated specifically for entertainment—money whose loss will not affect your household budget, your savings, or your financial responsibilities. If you cannot afford to lose it, do not use it for gaming. This approach keeps sharluck firmly in the category of leisure, which is exactly where responsible gaming belongs.