I discovered this new iPhone app today called "Boating Suite". It's essentially a boating log. It has a log book, fuel log, maintenance log, expense log, to do list, shopping list, and more. It's only $4.99 and worth it IMO. You can also directly e-mail all the data to yourself to back up the info in case you lose the phone. Their website is http://www.boatingcafe.com. Seems easier and more organized than paper.
(I have no affiliation with them, just think that some of you guys could benefit from it and wanted to share.)
(I have no affiliation with them, just think that some of you guys could benefit from it and wanted to share.)