Begin with the end in mind. Know exactly what needs to be done, and in what order, to get there. Start at the beginning, make small steps that can be measured as you go. Evaluate your measurements and be prepared to adjust, abandon, or pivot from the goal at any time.
Conversely, throwing shit against the wall to see what sticks greatly increases the odds of failure or at the very best, significantly increases the costs of success. Shit that sticks to the wall typically ends up making everything stink like shit.