Most of my spills have been from "Horizontal Track Stands" trying to get out of the pedals.
After I figured that part out, it's been smooth rolling with the exception of a near spill when my rear tire wanted to follow it's own track in the groove between the edge of the asphalt road and edge of the curb/gutter cement thing.
I didn't realize until after I got out of that mess how much I had been cussin' trying to straighten things out.