Tiredness is one of my worst symptoms. I am extremely exhausted all of the time. I get the nodding tiredness where I have to fight to stay awake. I regularly wake up at 4am too. It is awful.
Strategies? One of the major things I catch myself doing is reacting to the tiredness by doing more and more things and jamming as much into my day as possible. I am scared of being useless (see my blog post http://dialoguewithdisability.blogspot.co.uk/2013/01/parkinson-tiredness-and-fear-of-being.html). I find it helps to plan ahead. If you have a busy day, have a rest day the next day.
My tiredness can creep up on me. This is especially true when my medication is working well; I push things a bit more and then pay the price. Its about negotiating with yourself I think; is this activity worth the effort and the price I will pay? I find an increase in my medication increases the tiredness (again, possibly because it allows me to be more active and use up more energy).
As with the rest of this disease there is no silver bullet. It is just about doing the best you can
Good luck with it