I must be the exact opposite of you so. I've been writing fairly consistently for the past 3 years or so, but I definitely write a lot more if things are going bad in life which, ironically enough, they have been for the past 4 or 5.
Not that life has been all bad, it's really good too, but there's been enough badness going on to the extent that I'm literally haemoraging music most of the time. The only problem lately is that I've fallen out of the habit of writing lyrics, which is a whole other kettle of fish.
Anyone got any tips for getting back into lyric writing?
My advise is to regimentally write everyday for a period. Write anything, knowing full well that none of it will ever be used at all. The practice of actually putting words together is something which once you fall out of practice becomes daunting very quickly. While I was writing my thesis for example I was writing lyrics, short stories and posting extensively on here, writing became almost relaxing and it was really easy to connect my brain to my fingers, I also got better at typing which was handy. Think of it as training, once you are in the habit of writing you start to make progress at actually expressing yourself properly and once you start to write every day it becomes much easier to discard things which aren't worth continuing with, things you produce during a bout of writers block start off as life rafts and ultimately become albatrosses.