[whpalmer4]

The 3pm appointment I would not put in OmniFocus. That is an example of something which must be done at a certain time, and for that, a calendar (possibly with a reminder function) is the right tool. For something that must be done by a certain time, such as submitting a paper, OmniFocus is the right tool. Meetings, appointments, anything that has a specific time where it takes place, all go in the calendar. Everything else (preparing for the meeting, making the appointment, etc.) goes in OmniFocus. Check the calendar in the morning to see the "hard landscape" for the day. Maybe even block off some time to work on the big rocks if you like that structure. Whenever the calendar doesn't have you doing something, draw next actions from OmniFocus suitable for the context(s) in which you find yourself.