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 right one depending on your situation.
Maxpedition Mini Pocket Organizer Survival Kit - Take a serious look at "mini" versions of items you use all the time. Look for mini tools made from steel, not aluminum. Combine like items in small plastic bags.