Don't underestimate the amount of food and drink on the ride. I ride more or less by the clock: every 5 minutes I take a gulp of whatever is in my waterbottles. Every 15 minutes I take a bite of whatever food I have in my jersey pocket. Be consistent and you won't bonk.

40 miles is not a century, but it's a decent ride and if you are not careful, you could bonk or get dehydrated. After the ride, have some chocolate milk and chips, or whatever recovery food/drink you like.