[gravypod]

I prefer to rather then write tests plan out the interactions between all components in large projects. This will show you how all the pieces interact and what cases to need to handle in each functional unit. After this, I sit down an write all the code.

After I know the organization of the source, I write out each functional unit of the code one at a time. As I go, I write each bit of test code for my source. After this I integrate every function unit.

If a change is needed, I go back to the drawing board and find a better overall organization. This happens often due to either performance constraints or the need to abstract a section further.

After this I'd consider embedding a unit test suite.

Works great for small to medium projects.