Slots is one of those casino games that is 100% pure chance. If you've read some of our other articles, you'll know that being all chance tilts the odds severely in favor of the casino. Most people just love to play slots and many of the "hobbyists" simply play until they have no more chips.
The "regulars", on the other hand, use strategies. Some of their strategy makes sense to me, and other parts may only have a psychological benefit.
Basically, the veterans (the ones who win enough to keep coming back) will tell you to load up the slots (double or triple, when possible) to significantly increase chances of winning. As with most casino games, the increased risk of losing a little more money on each round keeps most people from betting in this way, and they do not realize that they are actually hurting themselves by betting small each time.
Taking what might seem like the safe bet (betting small) will actually drain your bankroll in 99.99% of all games. The real "safer" bets are discovered using mathematics and calculating odds vs. probability.
Progressive slots do not seem to payout as often as the typical slots machines, because they also factor in the jackpot in their algorithm. However, the payout of hitting a jackpot can really make playing these games worth it.