My brother sent me the 25 Laws of Car Restoration. Too long for here, but I added a few more (from bitter experience):
1. The Manual you finally found will always leave out one important step - or tell you what to do - but not how to do it.
2. When you break off a bolt (usually the last one left), you will find every size and thread except the one you need in your collection of 347 bolts.
3. Nine out of ten times, it's the electrical system. The 10th time - it's probably the electrical system.
4. The more you adjust an SU carburetor, the worse the car will run.
5. 99 out of 100 times, it's a stupid, simple problem why your car won't run. The tenth time - oh, oh. $$$$.
6. The further from home, the more likely the car will break down.
7. The one tool you need will never be there when you look for it.
8. When you get caught in the rain, you will not be able to get the top up until the rain stops.