Before you dismiss or even delete a photo that just doesn't cut it, try playing around with a few things in Lightroom, Aperture or Photoshop. There are a few things that transform a photo from mundane to Magnificent, but the quickest and most reliable two ways are cropping and converting to black & white.
The photo bellow was taken on an overcast day with a sky that was too bright to be dramatic and light that was just flat and uninteresting. It did nothing for me when I first processed the bunch of raw files that it was part of. But a few weeks later, I was flicking through my Lightroom catalogue looking for something to play around with and this one looked as though it had a lot of scope to be transformed. A quick crop, convert to black and white, push up the blacks and hey presto! Black & White is without doubt the best way to transform a color photo that looks bland.