simple .. after your aircraft has alighted on the water, wait for it to come to a complete halt.
Calmly exit your seat when invited to release your seat belts by the cabin attendants, and slowly move forward in the queue for the nearest emergency exit.
If you are stepping onto the wing having used an over wing exit, be sure to remove ones heels as they may damage the paintwork.
At this point flag down a passing liferaft / cruiseliner, and determine the point when it may be necessary to inflate the jacket in order to preserve ones makeup (if not of the waterproof variety).
If you are wearing expensive clothing you may choose to reconsider the use of the life vest altogether as it may cause irreparable creasing.
Please note that the above procedure requires a similar set of improbable circumstances to those you will have read on the safety leaflet now floating somewhere in the vicinity of the wreckage.
TR
