As I recall Mike Johnston wrote a column describing an exercise similar (in spirit) to Les' journal. Mike's exercise was simple: shoot a roll of film (I think he suggested one 36 exposure roll of 35mm) every week, get it processed, select the best picture and get it enlarged to at least 11x14 and put it on the wall somewhere very visible. Live with the picture for a week. Repeat at least ten times.
He felt it was important to live with the enlarged pictures. At a workshop last summer Tillman Crane described how he puts work prints up on the wall and lives with them - and uses a red sharpie to highlight what didn't work, or could be improved.