You just live with them, and take their existence into account. I have encountered a lot of snakes in our gardens, including cobras and malayan pit vipers, but harmless ones like rat snakes and golden tree snakes are even more common. None has ever been aggressive, and they try to get away from noise and movement, but accidentally stepping on them would probably provoke a bite.
After some close calls of a snake taking off less than a meter away without me having noticed it at all, I now always use boots and long pants when walking in weedy areas.
We also have centipedes with quite a nasty bite (never been bitten so far, but accidentally had one in my bare hand once when taking some coconut husk from a bag without looking) and scopions (been stinged quite often by the small ones, they sometimes come inside the house too - it feels like electric shock with numbness for a few hours afterwards).