(5) You don't have to stay in the same game and waste all of your money there. Remember, the probability of winning the next spin will remain the same.
This is the most general advice in slots since you don't have to do a statistical analysis while playing.
Strategy is general advice? Its all stacked against you. Its obvious if you do the math. Making actual long term profits with Slots is mathematically extremely unlikely. Its just a fun way to lose your money, if you ask me.
Especially with slot games with low payouts or unknowable, deterministic winning schemes. Don't get me wrong, I like slots. Its just not worth putting a lot of money in.
Play it for fun, not profit.
A good strategy is to leave a deposit and the balance due, and never play again. The house always wins. Trust me. This is not the free money you are looking for.
So, go ahead and play online Slots. Everyone else is doing it. They call it fun. But know that for every fun, you have a lot of losers* who are losing their life savings.
* No offence intended to fans of online gaming.