I recently watched a video on how to play craps in Vegas casinos (essentially how to lose your money the slowest) where I learned about true odds bets. Now I have spent an hour or more each day playing on a free online craps website just to see how that works.
Maybe I shouldn't say this in public, but I am ahead of the game in Vegas just because I didn't know how the house rules for roulette so I made a single bet just trying to lose my $20 quickly so I could get back on the road to Utah, I hit my bet (27) and a couple of other big payoffs within a few minutes and left with over $600 to the good.
There is also a penny-ante maneuver at which I have succeeded in reservation casinos. A couple of times when I just wanted to use a clean rest room somewhere out on the road, I signed up for the frequent-player club on my way in. They gave me a small "free slots" account of $10 or so. You can't just cash it in, but after a few minutes on a video poker machine, keeping track in my head of how much I have wagered, you cna cashout the winning deals. I have been able to walk out with a couple of bucks after performing the necessary functions.