Sale fatigue or playing the odds of a better sale?

I think I've been spoilt this year. There have been too many airfare and accommodation sales.

Today I went to book a great sale air fare only to back at at the final purchase to confirm stage because my inner voice asked if this was really the best rate I could get for that particular trip.

I also went to book several nights of accommodation for a few upcoming trips in an Intercontinental "72 hour" sale (sneak link here for early bookings in the really 96 hour sale period). These 72 hour sales have been recurring throughout the year. Once again I found myself backing out of booking at the final step figuring I may be able to do better booking later and there is no urgency to book these nights.

Hopefully it doesn't come back to bite me later with higher rates.