Many a times, things do not work if it is not done at the right time. Right thing at wrong time proves to be wrong. So, the idea or action can be great but if not timely implemented then can be a disaster.
Time has a great importance on its own. Few actions done on time saves lot of future effort. But how do you know which is a right time? You will have to slowly build this skill. You have to be circumspect and need to give full attention to the present happenings.
Once your active senses take the control of your actions then you will be able to judge any situation. Once you develop the ability to judge a situation, you will automatically be competent to decide what to do. This will definitely increase your probability to succeed.
Act on time!