Being a winning slot machine player is not possible. The machines in every slot are made to give the house an advantage over the long run, so the house always comes out in the lead if you are playing for long enough. The only real way to mitigate the edge of the house in slot machines is to play a game with a really big jackpot, bet the maximum every time you play, and hope you can win the jackpot. If you do win the really big jackpot then what are you going to do next? You must stop playing the game.
Don't get me wrong. I'm not saying you shouldn't gamble on slot machines. In fact, I think slot games, particularly the really good ones, are fun. But, it is important to keep in the forefront of your mind that mathematically what you're doing when you're playing the casino on a long term base is paying entertainment. You can calculate how much you're spending on entertainment by multiplying the house edge times your average bet multiplied by your number of spins per hour.
For instance, if you're playing a game of slot with a payout of 95%, then your house advantage is five percent. (The casino keeps 5% of every bet that you place over the long-term.) If your bet is $3, then you're going to pay an average of fifteen cents for each spin back to the casino. (5 percent of $3.) Assuming you're making 500 spins per hour, the game will cost an hour of play for $75 that may or may not be a reasonable price for you entertainment. That depends on your bankroll.
Another thing to consider in the calculation is what the bonuses and perks you receive by the gambling establishment are worth. If you're at an online casino nyaste casinon and you're receiving drinks for free while you play, you can subtract the price of these drinks from your hourly cost. (Or you can add the cost of those drinks to the entertainment you're enjoying--it's all an issue of perception.) My suggestion is to drink premium liquor and premium beers to increase the value of entertainment you're receiving. For instance, a Heineken will cost you $4 for per bottle at a good restaurant. Drink two Heinekens an hour, and you've just decreased the amount you pay to play every hour, from $75 to $68.
Slot clubs also refund some of your losses every hour, so be sure you join the slot club of your casino and always use your credit card to track your play. There's no reason why you shouldn't to do this. They also give their biggest slot players with comps like show tickets, meals, and free rooms, that all lessen the amount you're spending each hour that you play on their machines.
So how to be a successful slot machine player? I'd sum it up by saying that you should know how much it's costing you to play each time and every hour, take advantage of all the bonuses and comps, and go for the huge progressive jackpot.