Since you shoot in RAW, it is quite an easy job to do. Just boost your contrast a bit, and it will take that flat feeling of your colors immediately. Best way to do it is manually adding a contrast. I do it by using curves on the photo's histogram. If the photo still look dull, I then use the vibrance and saturation tabs (I use Bibble Pro from Bibble Labs for my RAW development). Though with adding contrast I am normally limited to only Vibrance, and most of the time I have to take a bit saturation off due to unnatural look of the resulting pictures.
My two cents, I hope it helps somehow.
