I wanted to make sure you knew the difference between a concrete detail and a significant detail. 
A detail is concrete if it appeals to one of the five senses (sight, taste, touch, sound, smell). So, for example, THE WINDOWSILL WAS GREEN is a concrete detail because we can see it.
A detail is significant if it also conveys an idea or a judgement (or both!).  So, for example, THE WINDOWSILL WAS SHEDDING FLAKES OF FUNGUS-GREEN PAINT is concrete and significant because it conveys the idea that the paint is old and suggests the judgment that the color is ugly.  It also implies something about the owner of said windowsill: is s/he too lazy to paint it or has s/he fallen on hard times and cannot afford to fix it up?  You'll want to copy this into your notebook under the title CONCRETE AND SIGNIFICANT DETAILS.

The rest of the period was spent in working on the rough draft of your short story (due at midnight tomorrow).