Hi, I have always followed the book and done 1/1 PP/PV As is said its only ever a day away from veg. There is always one day over the weekend then that will be a veg day. Invariably for me a saturday PV day ends up being a salad, and a sunday PV day is a roast and veg.
Its done that way for a reason, because Dr D found that people stuck better to the 1/1 alternate rather than the original 5/5.
Carrotts and beetroot are high in sugar and its recommended that you not eat them for more than one meal on the PV days. I find if I do veggie sticks for lunch i do one carrott. But I don't then have it at my teatime in veg or salad. Try to limit your intake of these two.
Also your veg should be 1 third of the plate and your protein 2 thirds, although thats not always pratical when its a salad from instance.