Being a winning slot machine player is possible. But all slot machines are designed specifically to be able to give the house a long term edge, so the home will always come out ahead if you play long enough. The only real way to counteract the home edge on slot machine games is to play a game with a really big jackpot, bet the max every time you play, and hope that you hit the jackpot. Then whenever you do hit the really big jackpot, guess what you do next? Stop playing that game.
Do not get me wrong. I'm not stating that you shouldn't play slot machines. Actually, I think slot games, particularly the really good ones, are a lot of fun. But you want to keep in the forefront of your head that mathematically, what you are doing when you're playing a
online slot gamble machine on a long-term basis is paying for entertainment. You can calculate the amount you're paying for that entertainment by multiplying the home edge times your average bet times your range of spins by the hour.
For example, if you're playing a slot game with a payout of 95%, then the home edge is 5%. (The casino keeps 5% of every bet you make long term.) And for anybody who is average bet is $3, then you are going to pay an average of 15 cents per spin to the house. (5% times $3.) Assuming you are making 500 spins by the hour, that game costs you $75/hour to play, which may or may not be a reasonable price for you entertainment. That will depend on your bankroll.
Something else to factor into your calculation is the amount the perks and bonuses you are getting back from the casino are worth. When you are playing in a land-based casino where you are getting free drinks while you play, then you can subtract the expense of those drinks from you're hourly cost. (Or you can add the price of those drinks to the value of the entertainment you are receiving--it's just a matter of perspective.) My recommendation is to drink top-shelf liquor and premium beers to be able to maximize the entertainment value you're receiving. A Heineken can cost $4 a bottle in a great restaurant. Drink two Heinekens per hour, and you've just lowered what it costs you to play each hour from $75 to $68.
Slot clubs also give back a share of your losses each hour, so definitely be sure you join the casino's slot club and ALWAYS use your card to track your play. There is absolutely no reason not to do this. Casinos also reward their larger slot players with comps like meals, show tickets, and free rooms, which all add up to reduce the amount of cash you're spending each hour that you're playing on their own machine.
So how to be a winning slot machine player? I'd sum it up by saying know the amount it's costing you to play each spin and each hour, take advantage of all the comps and the perks, and go for the big progressive jackpot.