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 or you could just try
Here's a great checklist of survival gear you need for disaster preparedness and prepping. Including Everyday Carry Items, Hidden Cache, Hazard Protection Gear, Looting Tools and a Get Home Bag Checklist.