Break the task down into smaller parts.
Get help completing the task.
There will be times that you do give in to current you and don't work towards your goal. You will feel like scolding past you. Putting yourself down telling yourself you never could, never will be able to and should not even try to reach your goals. Forgive your past self with all of your heart. And pick up where you left off.
Exercise and improve yourself. i read alot of self help books and this is what works for me. When I notice I am avoiding a task it mostly boils down to two things. Either I am being distracted by my feelings or I am unsure about what I am supposed to do.
To make sure I know what I am supposed to do I make a list. I prioritize the 3 most important tasks by marking them with an A. Then the next three B and the rest C. Then I start working down the A tasks in the order I wrote them down, then B etc.
If I am distracted by my feelings I will go to my journal and Identify, Accept, Attribute, Act (IAAA) . Identify my feelings. Accept them by letting myself be overcome by them and describing how it makes my body feel. Attribute what caused me to feel this way. Act how should I react to what made me feel this way.
When I come to part of accepting the feelings I will already start feeling some relief. sometimes I will have to examine my feelings over and over before I get to that point.
anyway this is what works for me but what works for you might be completely different so keep reading books until you find something that works for you.
Exercise is a good time to reset yourself. I find that if I do not exercise I feel ready to start on my tasks.