Other than possibly the difference of levels of energy, it must be that one person is able to manage their time more effectively than the other person. This does not mean that one person works harder, but rather,the person who accomplishes more in less time has figured out how to work smarter. Set time limits for your simple activities.
Some people are dawdlers.
This is fine for someone who has alot of time and they need to fill it, but if you are a dawdler and you wan t to get more done in a lesser amount of time, then you are going to have to learn to practice self-control and set limits on your valuable time. You can do this by setting a reasonalbe amount of time that the task at hand is going to take. Do not try to rush it, but on the other hand, do not allow yourself too much time to complete the task either. Let us, for example, that you want to clean out a closet. You will need to allow time to empty the closet out, then go through everything and throw away the items that you don't want or need anymore.