Assess your environment and develop a disaster profile that fits your circumstances. Plan in advance for mitigating those disasters/unfortunate events. Gather needed supplies/training/capabilities etc. in advance.

Pay attention to the news and weather reports. In the case of foreseeable disasters like hurricanes, follow Wildman 800's example and define actions to take as the event looms larger.

Get ahead of the crowd. If evacuation is desirable, leave early, with enough stuff. Do not be part of the herd searching for bottled water at the last minute. Fill your containers with good old tap water - it is very often the exact same thing.

Take good care of your dwelling and be sure it is up to code or better and reasonably built to withstand relevant hazards.

Don't live in Texas (but I knew that already). update: Don't live in the big cities in east Texas. West Texas is OK