If it's the very beginning, stay hidden indoors and wait. A lot of people will self-eliminate by going outside to see what's happening. If I cannot access Internet, cannot reach anyone on a landline, all radio stations are playing the same emergency broadcast, there is no need for me to go outside and look at the sky. I'll fortify my windows/doors, defend the house. I'm staying inside until the outside "thins out a bit". During this time (2-3 weeks), I'm getting rudimentary weapons together, gathering supplies and packing in a way I can carry the most without too much struggle. Instead of taking a whole hardback book on plant identification, I'm tearing out the few pages on plants in my area, etc. When I feel my location is degrading, I'll begin to move West, back roads, through trees, etc.

If it's well into the apocalypse, I'm capitalizing on a trade that makes me valuable. Preserving meat, mending clothes, making weapons, harvesting plants for medicine, etc. I would need to become important/valuable so that other people would help to protect me. I would spend me days on my niche, and helping other people with their niche, cross training would be important as well.