Most people use their SSD as their primary system installation disk with Windows 7.
W7 already has a lot of optimizations for SSDs, both in terms of performance and lifetime. Minimizing writes increases the lifetime of SSDs, so post each suggestion as an answer and let others vote on them.
I'm not sure anymore that minimizing writes is a good thing [tm], hard facts that SSDs will degrade within a noticeable time are missing and it seems this it can create a bit FUD about the functionality of the SSD. In other words: I question the usefulness of my wiki question.