Yes, for any overwater flying, wear (not just carry) wear your lifejacket, or, if the water will be cold, immersion suit. Actually wearing my lifejacket saved my life once (the lifejacket died, I didn't). Put your cell phone in a waterproof bag, clipped to your lifejacket. Though my phone was clipped to my lifejacket, it was torn off. My wife called it for three days, and it rang, but only the fish could hear it. The waterproof bag worked, though did not float! Consider that what you have on your person when you exit a ditched airplane is most likely all you will be taking with you. Carry in pockets/butt pack everything you would want to have with your while you're bobbing in the channel. For sure: Whistle, flares and light. I suggest drinking water and a snack too!
Form a mental note, winds aloft considered, of your "halfway point". Up to this point/time, I turn around, beyond that point/time, I continue, if there is a problem with the plane.