Coming from the old school of "safety in numbers" I'd suggest fishing with a friend first. Add to that a whistle, PFD and a floating VHF radio. Also a must read is the post by BigBarrels on his experience on a yak gone down.
http://www.bigwatersedge.com/bwevb/s...ead.php?t=7167
Most important is keeping calm in any situation and enjoy some
.