Plans
Oh sure, you don't know everything that will happen. You can't predict the weather or the silly things world leaders will afflict on their citizens. Nor can you predict the gifts people will offer or the opportunities that will open up.
But you can predict 100% who you will be and how you will improve. All it requires are three steps.
1. Make a plan.
2. Stick to the plan
3. When step 2 fails, return to step 2
2. Stick to the plan
3. When step 2 fails, return to step 2