My biggest struggle has been resisting "nap time." I typically lose. After two years, I am only just getting back to getting in some decent cycling mileage on a consistent basis. My old commute was 37 miles, round trip, and that gave me a fantastic base for almost anything. My only advice would be to always look forward, as your memory of what life used to be is very likely flawed and likely of no further use to you. We live in the present, looking to the future, as it is impossible to live in the past.