Here's the finale to one of my blitz games on Playchess.com. It shows you that playing on, seeking chances, is better than resigning early. I had already in mind a drawing mechanism which caught my opponent by surprise. All I needed was one tempo. He played 34. Qd7+ Ka6 35. Qc8+ Ka7 36. h7? allowed 36...Rb2+! and the perpetual checks followed.