I've listed 25 different tarp shelter designs to help you get started. Each configuration has its pros and cons and there isn't really a perfect design for all occasions. You'll have to chose the righ(Try Design)
The log cabin method is great, but it doesn't make an extremely tall fire. Also, those tiny, tiny, pine sticks that break off of the beaches are wonderful for starting fires. I've seen fires started with just a bundle of hose and a match.