If you are playing only against the online gambling site, which is always most of the case, you will eventually lose if you are not smart enough to stop when you need to. The reason is that, online casinos have house edge advantage - which means at the end of the day, they will going to win no matter what.
If you are smart enough you will stop when you win, but what than? Never ever come back to casino anymore?
High jackpot is only way to win in long term.
The easiest way in gambling sites is, do anything you want.
Accept loss or win, then sleep. Very simple.
What does this even mean? Are you sure you are in right thread?