Nice guide and most importantly gamble what you can afford to let go, because some gamblers may still have high and unbearable budgets, and it doesn't fall between the category of budget gambling.
We still remember a story of a gambler that staked up to 1.4 million dollars on a bet, so such a situation warrants the gambler to first analyzed what his/her state will be if he loses the bet and what emotional impact that will have on his physical and psychological well-being.
Budgeting should always be the priority and yes live within your means and take only the risk that you can afford. Gambling while you are not in a good condition is not ideal, because you might be tempted to gamble more, and this can result to a more losses. If you are going to casinos, make sure to have limited cash only and avoid getting more funds especially if you are losing, you have to stay responsible and stay focus.
I think it completely boils down to not being addicted, because anyone who is not addicted will easily have self control, and know when to stop playing when it looks like they are not winning anything, in such a situation, the gambler can still return home with some amount even of money, even though the entire amount was budgeted to gambling.
I use myself as an example, there are times I deposit $50 into casinos to play slot games, but half way into the game, I discover it's not my lucky day, I just quit and withdraw back into my wallet whatever amount that is left off the $50, this is only possible because I am not an addict.