I've never had much of a problem with inspiration to be honest. Ideas come to me, then if they're strong enough ideas and I feel compelled to write about them, I will.
The hard part is keeping the momentum going with things. I do standup comedy and also act, so I've often got something other than writing vying for my time (my 7 month old is also included in that!) So its more the 'showing up and doing work every day' thing that I find tough, rather than the inspiration itself.