Are there three small things that can be done in the next five minutes? Do them. Feel the momentum? Keep going and tackle a few more outstanding tasks.
To state it plainly, it takes an effort to get off your behind and start doing things that need doing. It is so much easier to sit at your computer sipping on tea or wine and clicking mindlessly through never-ending enticing links. Break the cycle. Get up. Look around you. Are there toys that need putting away? Do it. Now you can move around the room without tripping over them every two seconds. Do furniture, pillows, tablecloth, books need straightening? Do it. Now your immediate physical space looks a bit more in order. Likely your mental space does as well.
What else can you do in the next five minutes? Take out clean dishes from the dishwasher, or put in the dirty ones? Start a load of laundry? Whip up a batch of iced tea or sangria? Approach someone with a problem to get their feedback? Make a couple of phone calls? Pay a bill? Write an email? Take action and see how every small accomplishment fuels you for taking on the next task.