Try a 50% increase next time. Think about it: if you managed to get 2.5 times increase in such a short time you are likely undervaluing yourself considerably and you should move to larger steps.
There's a bit of a dearth of executive technical roles within reasonable commute of me right now. Its not been worth pricing myself out of the market completely until I can cross the sector boundary (lots of PM roles in aerospace that look nice...).
Hence; there is a balance, find your value but don't leave yourself without a second option.
