I think what works for me, not sure if it would work for everyone, but you know when you are lazing about, you start procrastinating, you say you will fill out those dreaded forms but you know the very thought is incredibly stressful, well I solve it a couple of ways;
One is to think of a good memory when you are feeling dragged, imagine a compliment someone paid to you, a sunny day.
Think what it is that is putting you off and then on break it down into tiny tasks, literally. So if the plan is the washing up needs to be done, don't think about the hard work, just run the taps and fill the sink and make a promise to yourself that you WILL complete the task. Chances are, you will get stuck into it and 'hey presto, job done'!
Another thing don't think about the task being difficult, all this will do is spread negativity into your head before you have even started it, just work out what needs to be done, don't get emotionally involved with chores.