i say just go by how it feels, if you feel no soreness, then do them everyday. If it feels a little sore........... still do them, just a little lighter. If its anymore sore than that, i guess it would be smart to take the day off.
A few times a month for the past few months I do some hard wet jelqs and get great gains. A hard sessions give 3 days rest. Normal session you should give a day rest. 3 days in a row is over doing it. For me anyway. Goodluck.
Like DLD says, listen to your body. I think he said that anyway, . If you feel sore, don't do anything that day. There is no rush in this Penis Enlargement game. If you feel like you can do 5 days in a row, do it! There's really no right or wrong here.