Do you ever feel so busy that you actually wish the day was longer so you could do it all and still get some sleep? Agreed. I look at my planner and Google calendar and come near a panic attack sometimes, but staying organized is essential to make the day not have to be longer in order for you to cross off all the items on that to-do list. First step: make a to-do list. Write it in your planner, on a post-it, on your wall, wherever. But write it down. It will help you realize all the little things you have to do and it allows you to pick a starting point. Maybe you want to do a few smaller tasks just to diminish the list a bit or start tackling a larger project to get some headwind on it. Whatever it might be that you choose to start, having it written down on paper or electronically lets you visualize all of the little (and big) tasks you might have that day.
Next, figure out what actually has to get done today. Many times, a few of the jobs can wait a day or three. And it is totally okay if they do. For me, these usually include: cleaning/laundry, printing out documents, and other smaller jobs. It helps prioritize what is important.
Finally, just do it! Sit down and get a head start on your day. If you know what is truly important and what has to get done, you can do it. You have the tools to make that priority list and all it takes is 5 minutes to do so. I guarantee it is 5 minutes you will want to spend time on.