I set mine up with single press home button, and selected "Background" under "Become Home Screen".
Basically this amounts to having ProSwitcher the default app manager, things automatically background much like a normal OS. I quit out of things manually that I don't want running.
Combined with VM, I generally have 5-6 apps running at all times, no significant drop in battery life.
In my Dock I have a categories folder called "Apps", as well as 4 most used applications. I don't even use the Springboard anymore.. all goes through ProSwitcher/Categories.