So why is it so bad to burn your bridges? Are we that affraid of what's ahead that we always need to know we can move backward if we need to? Why would we want to move backward? Are we so unsure of our forward movement that we need that bridge there for us to travel back across with our tail between our legs?
I say learn from the past. Don't go back to it. Move ahead with conviction. Know what's ahead. Study your path, know the route. If for some unfortunate reason the path you have chosen is the wrong one, change direction, just don't go back. There was a reason you moved ahead in the first place.
Don't move carelessly. Think it out. Make sure it is the right decision for you. Once you are confident you are moving in the right direction........ pop open a cold beer, light a match and watch that fucker burn!