I don't do much preparation before I do PB attempts in static... then again I haven't made that many PBs yet
But I added 38 sec to my PB yesterday
1) No special routine just before a PB attempt. I usually do light-to-mediumhard dynamic training (technique, intervals, length) for about an hour before, but that has nothing to do with preparing for the static. The static is just an add on.
2) I only do wet PB attempts. Because I suspect dry PBs come easier and then I would be disappointed with my wet static performance. I only do tables on the dry, though, because I can only do up to 4 breathholds in water without getting cold and start shivering, even with a wet suit and in a 34 degree celsius pool. My dry tables consist of 8 rounds of ventilation and breathhold.
3) Haven't been in a competition yet.
4) Until now: once a month. From now on: maybe twice a month