I can get a story started, but when I get to the parts where my concentration or inspiration is most needed, I stumble something shocking.
When I want inspiration I find certain art works helpful. Especially art related to the topic I'm writing about. I've printed out some awesome artwork that I have stuck in my note pads. It's just my personal little thing that helps me, gets my imagination flowing. What everyone else said is also very helpful.
I hope you find a good source of inspiration Solumina