Don't think of the ride as 65 miles, or just 40 miles to go etc. Break the miles up into parts, 10 or 20 miles to the next sag stop, etc. and just focus on those miles. The time will go faster and you'll be at 65 miles before you know it.

If I'm doing an unsagged ride, for example 60 miles, we try to plan lunch around 30 miles. That way there's only 30 miles left to finish. So its 2-30 mile rides instead of a 60 miler.