Google+ has improved RAW to JPEG conversion for a number of cameras, check out if your camera is supported.
Improving RAW-to-JPEG conversion on Google+
The ability to read what is the source of light in photos might help you to understand how to use lighting in your own photos. Check out the following article from fstoppers.com.
How to read light in photography part 1
Ever wonder how those photos with star trails covering the sky are made. The following article from PetaPixel provides a complete guide
A complete guide to star trailing
Some photography tricks that only cost little
8 Photography Tricks