Just chiming in to say the low-carb breakfast/high-carb dinner approach works really well for me too. I have energy all day and sleep more deeply than I have in years.
I also discovered quite by accident that too much carb in my lunch (a small serving of white rice, for example) makes me dangerously sleepy on my commute home from work. So my lunches are low-carb too. I save most or all of my carbs for dinner.