A common trap that many poker players will fall into comes when they have suffered a major dent to their bankroll, perhaps in one session where losses and bad beats have piled up on top of one another. No poker player likes to come away from a session having lost money or to quit having just suffered a big loss and so they will often try to remedy the situation.
The instinct when this happens is usually to try and quickly win back those losses. This often involves moving up to higher stakes, in the belief that they'll be able to recoup their losses in one or two key hands, or else they loosen up and start playing starting hands that are below their usual standard. This is actually a form of borderline Tilt.
You may indeed get lucky and recoup your losses but the usual outcome of moving up to higher stakes games and loosening your style of play is that you make mistakes in your pursuit of your goal and the losses actually increase.
If you are at a table where you're clearly one of the better players but have suffered some bad luck then, by all means, try to win your money back, but do so by maintaining your discipline and playing your best game.
One of the best things to do when you're losing at a table is to just accept that it wasn't your table and leave. What's lost is lost. Rather than chase losses on a table where you might start to look desperate to predator opponents, take a break and remember that there'll be another game tomorrow, or even the day after. That's the great think about online poker. The next time you turn up there will be a game waiting for you.
You can come back refreshed at a later date and set about building up your Bankroll again.