You have an entire list of things that need to be done, but so many of them just keep getting put off. In this list you will have that one thing that keeps getting put off eternally. One secret to being more productive is to get the most difficult thing done fist. When you do this: A. you feel like you have achieved something important with your day, and B. everything else will seem so much easier.
Start with the hardest task. When you have a list of things to do, and you start with the easy stuff first, often we take extra time on that easy thing so that by the time we could get to the difficult task, we have run out of time. For example, if you are someone who likes cardio but hates weight training you might gravitate towards doing your cardio first. Go full force and you tell yourself that you will do cardio for 30 minutes and then you will do your weight training. If one day you are really in the groove, you can go for just a bit longer with the cardio and then you look at your watch and you say, "well, I really only have 15 minutes left before I should start stretching so I can't do all that much weight training in that amount of time. Might as well just keep doing my cardio." Or you could do 30 minutes of your cardio and then you get done and you say, "Eh, I am just too tired or not feeling it. At least did my cardio. I will start the weight training another day when I am feeling up to it." You will continue to put it off. Instead of doing what is easy and you enjoy first, go for what is more difficult. This way you will actually get everything done, not just what you find easy.
An example of this could be that cooking is something you do not look forward to. Instead of getting cooking prepped, you spend more time cleaning the house, or giving some quality time to the dog. It is not that the other things in your life are not important, it is about realizing you are putting things off. Your meals happen to be a very important part of your health, which effects every area of your life. So instead of getting distracted right away by something that is a little higher up on your list of things you enjoy doing, get the food started first. Besides if you learn to just do a little bit of prep work it can become so much easier on a day to day basis.
Start to pay attention to what you are putting off and make an effort to do that difficult task first. You will feel a lot of weight lift off your shoulders and everything will move so much smoother in your day when you do not have that task hanging over your head. If the task you keep putting off is something you are really resistant to doing you can also start to look for solutions on how you can find some joy in this task. If cooking is something you really don't like doing then maybe get your kids involved. Or, try putting on your favorite show while you are cooking so that it becomes a time to also catch up on some shows or watch some movies. Better yet, if you can afford it, hire someone to do your cooking and eliminate it completely. If weight training is something you do not enjoy then test out working out outside instead of the gym or find a workout partner so that it is more entertaining. There are solutions for everything you just have to stop and take a look at them. Link Obstacles and Solutions
Look at what it is that you keep putting off, is it your workouts, paperwork, important phone calls, cooking, etc. For many people, their exercise is the most difficult thing to get done. People lament having to put the time or effort into keeping themselves health, yet they always feel great after it is done. This is why many people choose to do their exercise first thing in the morning. Occasionally you will hear, "I do my workout first thing in the morning, before my body realizes what is going on." This quote, although comedic, has some merit. You will feel more productive if you start following these principles.