Decide and act are two operative words. If you are wishy-washy, unclear or cannot decide, then it will be hard to make progress.
On the other hand, if you are decisive but slow to action, you will not go too far either.
Once you have done your homework, make a decision. Then, execution is the name of the game.
If your progress is not at the level you want it to be then check whether the decision or the action is the thing holding you back. The only other road block could be a wrong decision!