I'm huge on blackjack.
Tips I have about that at a casino... don't do it unless you can stomach kicking people out of your table.
Sure, a lot of people are under the impression that the game is pure luck, and it is the prerogative of any individual to hit/not hit according to their personality. And I can personally attest that that mentality is a crock of ****.
Blackjack is a table sport. Meaning, everyone is in it together, if done correctly.
The key to being successful at black jack... minus being some sort of prodigious card counter... is patience. On the off chance, there is always the low probability that someone can go in and catch a hot streak at the beginning of their time at the table. There's also the nearly impossible "beginners luck" that allows people to believe that playing carelessly and independently from how those around them play is acceptable.
There are rules to how to eventually turn profitable at 21... but there are a couple of essentials.
The first essential, is playing with people that play the same way that you do (and i'm taking as a given that the playing style is the one that you're alluding to). The whole table loses or wins together.
This means that if everyone plays the "proper" way: Dealer showing a face card 6 and under, you stay holding cards worth 12 and over. Dealer showing face card 7 and over, you hit until you have 17 or over or busting. (The basics of that playing style)... that everyone's fate should be pretty similar.
After the entire table is playing that way, the second essential is patience. The vast likelihood is that you're going to enter in a shoe and stay even, or maybe even start on a losing streak. I think blackjack can be an all day affair, if it has to be. There needs to be a time commitment under the likely event that you go under. There also needs to be patience in terms of discipline. I can't begin to tell you how often i've seen friends or just random people at tables lose big because they couldn't be disciplined with their betting. People lose money and their first reaction is to double down to try and win it all back at one time. That's usually how some people are suddenly down $500 or more within half an hour.
You play minimum bets when the shoe is screwing everyone.
You start doubling, tripling, or increasing to whatever amount you are comfortable with, when you start realizing the shoe is screwing the dealer consistently.
Which leads me back to my first point. The likelihood is that you're not going to go on a casino vacation with 5 buddies, all of whom are invested into riding out the good and
bad stretches of black jack. When you sit down at a table, you better make sure that the people who are playing are playing sensibly.
There have been times that I've gone to a casino, not really paid attention to the people playing around me, and they've lost me hundreds of dollars. It really doesn't matter how you're playing if those around you are hitting when they have 18 (for example) and stealing the 10 you needed right after them.
Either have to kick them off the table so they can go lose money doing stupid **** on other games or unfortunately, if they give you "it's my money and I can hit whenever I want" speech, move up to a table with a higher minimum so you can avoid having you shoes and momentum tainted.
Blackjack is very much a game of momentum. Have to ride out the losing streaks and capitalize on the hot streaks when they come.
Not going to make like 25k on one hand, but you can make north of 1-5k within a day, if you play with the right people, stay disciplined with your betting during cold streaks, and invest some time into it.
I've had friends who have gone to AC or Vegas for a weekend and won like 15k. I've also had other ones who have come back down 3k when they haven't done those essentials.
I'll never forget one of my friends coming back from a trip to AC. I think he was up 5k and was calling it quits. Was on a hot streak and put like 1k on a hand. He got double 8's. He split, meaning he had to put down an additional thousand dollars... at which point he pulled another 8 and split again. At this point he has 3 thousand dollars of his 5 on the table. He pulled a two on the first 8 and doubled down. Pulled a 3 on the next 8 and doubled down there. All 5 k was on the table. Miraculously, the dealer busted and his overall winnings went to 10k. Said the feeling of adrenaline was like nothing he had ever felt.
Those stories are once in a lifetime. Waiting for mine.