I found this interesting website:

http://www.cptips.com/sixrides.htm

It has suggestions for 6 common types of rides:
Commute or Social Ride - mild to moderate effort, 15 to 20 miles
Basic Training Ride - moderate intensity, 15 to 50 miles
Intervals - intermittently high intensity, 10 to 30 miles
Long Distance Ride - moderate intensity, 50 to 100 + miles
Competitive Event - high intensity, 20 - 30 miles
Multiday Ride - moderate intensity, 50 to 100 miles per day

And 2 tips on Pasta and Rice:
http://www.cptips.com/pasta.htm
http://www.cptips.com/rice.htm