How do experienced players manage stakes when they hit a winning streak?

I've been playing online poker for a few years now, and I've had a couple of runs where I've gotten really lucky and won big. It's exhilarating, but it's also really hard to know when to scale back. My main question is about bankroll management when the stakes are high and the wins are coming quickly. Should I increase my average buy-in size gradually, or is it safer to stick to a consistent, lower bet regardless of how good I feel? I'm trying to avoid the classic mistake of getting overconfident and blowing it all on one bad hand. Any advice from people who have managed high stakes successfully would be greatly appreciated.