I was struggling a bit with managing projects and sub-projects in Outlook, and thought I'd share something I found particularly useful: the role field.
Like most of you, for the 20 & 30k areas of my life, I have multiple projects. I added the Role field to tasks in outlook, and now have a way of keeping an areas' projects grouped together.
For example, under finances, I have projects related to health insurance, life insurance, $ allocations, stock market investments and real estate investments.
By filling in the Role field with Financial Freedom, all of the projects are now grouped together.