for long projects, nested vegs work quite well, though I must admit, my v7 used to render faster than v8 nested vegs do.
OR, try opening multiple instances of vegas at once. Can be very efficient way of sorting the wheat from the chaff – just copy/paste between them.
OR one instance of vegas rendering / capturing while you work in another instance.
also, you can jump to a specific Marker or Region simply by typing that number. very efficient for jumping around a long timeline.
😀