1. Eh, I wouldnt let his game dictate mine that much.
2. You are only causing stress upon yourself.
3. This one I agree with. But if you're playing against solid players the only putts in the long gimme range should be for birdies.
4. Again, I don't like to get into my opponents game this much, and if somebody else does this against me, it really makes me think less of them.
And on laying up....I would lay up usually if its a small green over water and I'm 2up because then I'm hitting a short 3rd shot, while my opponent is hitting a short 4th shot. No reason to take the risk when the odds are for you.
This of course is just my opinion, and I went 4-8 in matchplay this year in the michigan publinx, and only won one match at the state matchplay, so not a great record.