Of course,Joel. That reminds me of two other rules I've learned:
The 50-90 rule: if there are two ways of doing something and you're not sure which is right, you have a 50% chance of getting it right the first time...and a 90% chance of getting it wrong. It is amazingly accurate for me.
The boat list rule: if you have 10 things to do, and you do 7 of them, there are only 8 on the list.