First, you must become a prepper in mind and body. 2nd, buy some books on prepping and be ready to spend around 5k - 10k on supplies, guns, and non-perishable food. If you have a basement, even better. Get organized. Find some friends and family of the same mindset. If you can, get to really know your neighbors and feel them out in your organization efforts.
Be sure to leave liberals out of you efforts. They will turn on you in an instant.
Step 1 is to move as far from cities as possible.
If you live in a heavily populated area it just makes everything a hundred times more difficult.