After Japan's earthquake and tsunami earlier this morning, California and Hawaii are both under a Tsunami warning. If you don't have an adequate emergency kit in your home, this site will help you put one together so you're prepared.
After a major disaster, emergency response units are usually spread pretty thin, so 72Hours.org recommends you plan to be on your own for 72 hours. That means keeping in contact with someone outside the boundaries of the emergency, making a household plan, making your home safe, and putting together a disaster supply kit. 72Hours.org will walk you through the entire process, so you can stay calm and collected and make sure you have everything you need-beyond the obvious food, water, first aid, and into the other useful items like liquid bleach, duct tape, and a crowbar. Hit the link to see the entire process, and spread it around to everyone you know that may be affected by the coming storm. Also note that you can print the entire guide in PDF form-it's probably a good idea to print off a copy and keep it in your kit, especially the "what to do if" section. And if you're just waking up and want more info on the storm, Jalopnik's got a great roundup of this morning's news so you can catch up.