[Stronico]

1. Care about technical matters and show that you care about technical matters - if you're selling something technical it's good to have complicated opinions on technical matters

2. Someone who is difficult in good times will be a monster in bad times

3. Repeating the words of other's back to them is eerily effective

4. Every client is in the middle of some sort of political drama, you will be some minor part of that drama - this is normal and not that meaningful