I really think you should be looking for your own story lines.
1/ We probably want our ideas for ourselves.
2/ Even if we didn't, it wouldn't be your story, it would be someone elses.
3/ Are you going to pay us for these ideas or are you just looking for a free ride?
Ok, some constructive suggestions - the dream idea might work, free association writing on a subject you are vaguely interested in can work too. Try creating some kick-arse characters, one's that have very different life outlooks form each other, put them together and see what happens. Try polishing your writing skills with other projects until that bolt-of-lightening idea hits. Or else, you can do what so many other hacks do and just copy someone elses idea in your own words and call it your own.
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