Exactly what I had to do in 2004 when I heard one was on the way and I was kitesurfing off the One Eye in Mauritius, panic, have a dread feeling in the pit of my stomach as I raced to gather my family together, to get them to high ground, then rang the UK to try and get some news as to what exactly we could expect, not easy on Boxing day.
The worse thing is the lack of news, how big, which direction, etc etc.
If you are alone, then the best place is out to sea, you hardly notice them, they have a very long wave length and only tend to surge, like the tide going out then coming in all in one go, experienced one in Japan once a long time ago, but not as scary was the 2004 one, which as it happened just passed us as a tidal surge being the wrong/right side of the island, the took the brunt up north.
Very scary though if you have dependants around, not nice at all.