Most likely, you are not lazy. What you lack is an emotional connection to what you are (supposed to be) doing. You can overcome this obstacle with one simple step: imagine succeeding at the task.
If you imagine the negative outcome, it will weigh your energy down. Imagine a positive outcome. It will give you the momentum to go for it and complete it. You’ve got to keep visualizing your “desired” outcome; the reason why you have this task in your To-do list.
If imagining the positive outcome doesn’t get you moving, then maybe it is not what you truly want/need at this time. Maybe your energy would be better used on reevaluating your options.