There is no such thing as planning or preparing in advance, especially when it comes to things that can’t be predicted or anticipated (note that nothing important can really be predicted or anticipated). You can hope that you’ll be ready for the unexpected, for the change, for the opportunity when it comes, but the fact of the matter is that you really can’t be and that you won’t be.
Only thing you can do is to trust your judgment, skill and knowledge not to screw you over. But eventually they will (especially if you’re trying to innovate and make change). All you can do is to accept it. Embrace the uncertainty, embrace the unexpected, learn from it and move through it.
And don’t forget, if nothing unexpected or unwanted happens to your (either professionally or personally), you’re not trying hard enough.