Singles Flat Rate Strategy?

Hey everyone, I recently started a couple of singles flat rate games (Game 6272000 and Game 6309521) and found out I know almost nothing about the strategy involved in such games. I've played a lot of doubles flat rate games with Laddida, the best doubles partner on CC, but singles is a whole different ball game. I've only played 12 games like that, and the last one was about a year and a half ago
Sooo I was wondering if anyone could give me some tips and advice on general strategy in such games, or direct me to a thread detailing some strategies on the subject if it has already been discussed.
So far I've realized:
1. Bonuses are far more important than in escalating games.
2. The first cash in or two can have a huge affect on the game (later cash-ins don't make as much difference once people have built up the borders on their bonuses).
3. Wiping a person out is not worth it unless they are extremely weak with lots of cards.
...and that's about all I've learned.

So far I've realized:
1. Bonuses are far more important than in escalating games.
2. The first cash in or two can have a huge affect on the game (later cash-ins don't make as much difference once people have built up the borders on their bonuses).
3. Wiping a person out is not worth it unless they are extremely weak with lots of cards.
...and that's about all I've learned.