If you're all alone, keep a look out for lights and fires at nighttime. If you see one or more, consider venturing out yourself to make new best friends, but only if you think the end would justify the means. How far away is the light? How quickly could you get there? What would you be risking by leaving? Are there predators or obstacles in your path? You may be better off being alone, for now.
First you'll need to find water. Water flows downhill, encourages vegetation, and collects in natural caches, be they ponds, lakes, rivers, springs, rock depressions, or even leaves. Unfortunately, most fresh water sources are not pure enough to drink from (as they used to be), so you'll need to know how to purify water under most situations. Use any of these methods to collect clean, purified water:
In a world where the bombproof bunker has replaced the Tesla as the hot status symbol for young Silicon Valley plutocrats, everyone, it seems, is a “prepper,” even if the “prep” in question just means he is stashing a well-stocked “bug-out bag” alongside his Louis Vuitton luggage in a Range Rover pointed toward Litchfield County, Conn. Here is a checklist for the neo-survivalist preparing for the apocalypse.