I am know expert and actually I am in about the same stage of training that you are in (cutting weight and bumping miles) but here are two suggestions.

This time of year with less sunlight and weather changes affect me in a big way. It always has way before i got into cycling.

Also I think one of the biggest mistakes we make is not listening to our bodies. If we are tired we need to sleep. If we are truly hungry and not just wanting food out of boredom or for emotional reasons we need to eat. Our bodies truly know what they need. We just need to become smart enough to listen to them!