You could try a hidden not-really-a-feature feature and tag your morning goals with one tag and your afternoon goals with another so that you don’t see your afternoon goals when you need to be working on the morning goals:
One other thing I used to do that might help is that I’d fiddle with the deadline just enough so that I’d get a sort order I liked. I didn’t want the deadlines to actually be much earlier than the standard midnight deadline, so I’d make the first thing I wanted to do due at 11:51PM, the second at 11:52, the third at 11:53, and so on. That way, they showed up on my dashboard in the order in which I should be paying attention to them.
(I also tried making myself a custom dashboard, and I use that much of the time, but that’s probably overkill!!!)