What is your longest ride? How many days a week do you ride and how long are they?

Personally, I'd like to have a 25-miler in beforehand--preferably 30 if I wanted to finish comfortably.

The rule of thumb is add 10% to your longest ride each week. However, my BIL once did a century with me--his longest ride was 40 miles but he rode 15-20 miles almost DAILY. I don't recommend that, though.