One of the most important things that I believe-in in this life is PLANNING. As they say " if you fail to plan, then plan to fail ".
But I , personally, have one thing to add to this. My own strategy is to ALWAYS have a Back-up plan ( that's why I call it B, not because it comes in second ). It's of the same importance to having a plan in first place.
On planning anything I always have this question " what if it goes wrong ?" so, I usually have an answer to that ready in my pocket.
This is my own strategy and I've tried it with quiet success till now.