What must I do if I get bitten by a snake alone in the wild?

Depends! Venomous bites will require immediate treatment and if you are alone, having your cell phone is your most important tool. Non-venomous snakes may cause irritation and any bite can become secondarily infected, but usually simple cleaning and general first aid can deal with them and known you tetanus status. Exceptions could minclude severe allergic reactions or untreated infection.