I think the most important money management tool, for me, is accepting the gamble. Not accepting losses before they even occur. I disagree with that mentality more than anything, and that's also why people get grumpy about gambling (not that that's entirely bad). But going in somewhere saying you consider your money gone when you hit the door because it's "entertainment" is not helping. Your entertainment is gambling. You don't gamble to lose, even though you will. The entertainment part comes in in the fun you can have trying to win. That's also why I avoid grumpy tables and grumpy casinos (hi, Sugarhouse!). All of that said, I also don't believe in house money. Once it's in the rack, it's mine. Slots are trickier, and that's why I used to break down that money into fives, but now am content at tens and twenties (on a very small portion of the bankroll). I get a nice run, that TITO is cashed and goes home with me.
So in AC, I have a trip budget/bankroll. I make sure all of my play fits into that, so at worst I'm headed to the room at the end of the trip, grabbing a snack on the way up. At best, I buy the kids an extra surprise. In Vegas, I have a daily/casino specific bankroll, with "freeplay" to add in to another if I'm enjoying myself or to take to a new property. I'm not worried about fantastic comps in Vegas because I don't frequent it enough to warrant spending extra to get them. I've had one Vegas trip so far where I spent my entire budget. One trip I took the remainder and bought a new TV and PS4. If I get my fill of fun, I can easily spend the bankroll or walk out. And if the trip sucks winning wise, I have zero problem rolling back and making the most of less than that. ALWAYS remember you can go back again. In the vast majority of cases, the place isn't going anywhere. That helps TONS with money management. I have a Winner's Bank just in case the wins arrive, but I've walked out after a few hands up a lot, and I've left with the last five in my pocket after hours because I decided I wasn't going to give them anymore. The key is finding a place that works for you and your expectations in the casino. We've all given it back. We've learned and we've ignored. But don't let the stupid days completely disappear. Put them in your bank as a reminder that you never want to become Franklin.