On the first of each month I would start a new painting and paint it ONLY for the duration of that month.  For 2017 I found a strategy to stay within the square format.  In 2018 I am revisiting each month again, in turn, to work into them more and to break out of the square.

Months Squared: January 2017 (left) Months by Color 2018 (right)
2017-2018
oil on panel
20 x 16
MONTHS SQUARED | MONTHS BY COLOR 2017- 2018