Combined activities view?

Combined activities view?

I'm trying to create an activity view that will show all upcoming activities sorted chronologically.  I'm running into a few issues that I don't know how to handle.

1) How to include a criteria for today onward?  I can do tomorrow onward, but I'd like to include today also.
2) How to be create view so that all current activities show?  I want my view to include future activities and tasks with a due date that has not passed.  I've only figured out how to get one of the two, but not both at the same time.
3) How to sort chronologically a mixed activity list?  If I have 2 meetings scheduled for today, and 3 tasks that are due today I want these to be grouped together.

Thanks.