Hi,
I am no expert but from past experiences when you go fishing out with your boat take the following into account:
Carry an air horn and a small mirror (Nothing expensive) to signal your location.
While going out, if you have no VHF, check your mobile for reception.
Latest mobile phones have GPS installed in them to track your location in case of rescue.
If you have a recent mobile check if you can intall maps on it here:
http://www.google.com/mobile/maps/If you gonna carry anything with you on the boat it has to be this:
Water 2 bottles each min so you keep hydrated
Sun cream and a good tent
Very long thin rope and a small anchor so you don't drift out
Toolbox and extra new spark plugs
Another crucial thing if you gonna go out far at sea is simple:
Dont go alone and dont go too many people and tell someone where you are going and what time you should be back.
Hope you guys read this.
And please add to this post, I probably left something important out.