Ah. Procrastination. A common enemy!

Procrastination is often the result of being unsure. Unsure of what you actually want to be doing. Unsure of what your goal is. Unsure of whether you're doing the right thing.

My first tip for overcoming procrastination is to do a bit of planning. Really consider your goals, and really get them embedded into your thoughts by writing them onto index cards, putting them onto post it notes and sticking them up around the house. Then, consider how you are going to reach those goals. Do some research into how to fulfil your specific goals (or hire a specialist, like a Personal Trainer to write you a programme!). Then, follow the plan. Don't think about it. Just follow the plan. The work that you've done in setting your goals and creating the plan has removed any need for being unsure.