I wear my hair in flat twists 98% of the time - I can't DO cornrows on my own hair (I can't get them all to look the same!
), and my hair is DEFINITELY happier in them than it is out of them - esp. my ends.
I redo mines once a week - the flat twists only take about 30 minutes to put in, so I don't mind redoing them every weekend, and giving my hair some deep & intense loving then.
I make a moisturizing mister that I use during the week - jojoba oil, glycerine, a little conditioner (either Humectress or Oyin's Honey Hemp), and water. I soak my hair with it at night and baggy, to let the moisture soak in, and then mist it again lightly in the morning, and tie a doorag on tight so help keep the frizzies under control. I suspect as my hair gets longer, I won't have to worry abut them as much.