Just gotta find what works best for you. I like to start at 7am. Which could help explain why i am not in a band, who wants to wake up deink coffee and start writing? As far as the bars go i lime to just do 4 bar parts even though i count in threes. But if all you have is 4 bars just save it in a folder with the tempo listed. If nothing else you can come back to or just try and fit in with another tune your stuck on. Just list tempo and key ... it will help.