Forcing one out will only lead to chaos and destruction. It will be messy and dirty and you will regret it. Just try to let it come at its own time. I’m talking about creative thoughts. Inevitably when writing, you will come to that point in the road. There is a path leading you to the next spot where your story continues except you’ve hit a small hiccup, you’re out of gas. The thoughts fueling your imaginarium-mobile ran dry, you sputtered and now you’re stranded. You could trudge through and go on foot, but it’s a chilly bitch out there. You sure you want to risk it? You could get pretty lost and just have to trek back to pick up from where you started.
As ludicrous as it sounds, you produce your own fuel in your own time. I’ve found that if I write for too long, the elasticity of my imaginarium gets worn. To repair it, I either take a few days and listen to some music, read a book (other people’s works are inspiring) or watch a movie I’ve never seen before. Generally out of those three, something will get my motor running again. If not, try writing five pages on the first topic you’d like to see in your next book. A change of pace might help get you back into the creative spirit.