30 minutes.
Weekly Environment Lighting and Color Studies
I don't usually do environments because I don't like them.  I don't like environments because I'm not very good at them.  I'm not very good at environments because I don't usually do them.  See the problem here?  It's a vicious cycle that I'm hoping to break.
Committing to a daily posting is, unfortunately, unrealistic for me.  I feel good about weekly, though.  I will do environments both from observation and of my own design, focusing on lighting and color.  In general I work in Photoshop with a Wacom tablet and stylus, but don't wig out if I throw in some traditional mediums here and there.

