Something I've been having fun with recently. Head out on a reasonably bright day (or go somewhere with a big fat exposure latitude) and overexpose so you're not
quite ending up with a blank white rectangle. Then see what sort of image you can pull out of it in post.
Example:
fig1: a little dark for our purposes, but it'll do. Shot in RAW. 
fig2: this is what it looked like after a run through Lightroom. Adventures in highlight recovery. 
fig3: after Photoshopping back to a reasonable exposure.
You get some odd stuff going on. More detail in the shadows than you'd normally expect, really smooth highlight areas, barmy colours creeping into the blacks. I like it a lot.
This is probably my favourite one so far:
click to embiggen
Don't think it was even from a RAW file, just pulled back from a very bright .jpg.
I want to try setting up some of my own lighting to play with this more, and also to see what effect mucking around with the white balance has, seeing if it'll clip different channels in different places.
If I wasn't such a fucking pudding I'd have taken a normal shot of that fruit for comparitive purposes, but there you go.
