The second interpretation of the last post, this time more pertinent to end products.
2) Just because you’ve seen something a thousand times before in media doesn’t mean it isn’t worth doing.
You just have to find a good way to make a yours a little different. One way to do this is to combine a couple tropes. Seventh Sanctum’s Character Scrambler has exactly this idea in mind and makes some cool results; I once got this out of it:
The wild mad scientist who is a reincarnated princess and who stands alone against the Main Villain.
Sounds like a great character to me.
Another fun way to mix things up is to change the way you portray something; make the necromancer the good guy, make democracy a scary thing, turn your raptors into this: 
One last way to make a unique variant is to examine the realistic outcome of it. TVTropes calls this a “deconstruction,” and also provides the example. Consider teleportation in science fiction. Nobody ever seems to take these far enough; teleporters would easily change society. There would no longer be any need for cars or other transportation; location is no longer a relevant factor in any event; you could drop a live warhead on the lap of an archenemy. Heck, if it works via disintegration and reintegration, then why not skip the reintegration part and use the teleporter itself as a death ray?
