Ha ha the best way is just avoid the countries that have snakes.

In saying that I have worked out country up in the iron ore belt of Western Australia and hunted buffalo in the Northern Territory and only ever saw 2 live snakes (in WA). While always conscious of the need to be careful especially if lifting material where snakes maybe hiding underneath etc, we didn't get too paranoid about them.
Must admit coming from a country with no snakes they don't endear themselves to me, certainly makes life much more pleasant when you do not have to think about anything slithery or crawly that can harm you when out hunting or just going about your business anywhere inside or outside.