I think using a silk bonnet/cap and/or pillowcase (I use both) really helps with second day hair. My hair doesn't seem to like anything added to it except a drop or two of a light oil (camellia) or something like SS Emolience to smooth a bit. Right now I'm using the Emolience mixed with a drop of oil for better distribution. Gives a nice shine and tames any frizzy bits. My second day hair is pretty good; third day is sitll a work in progress.
3a/b, F, normal porosity

Wash with either Suave Tropical Coconut, As I Am, or CJ Daily Fix
Condition with STC or Yes to Blueberries and detangle with Denman, rinse very lightly (baptismal rinse)
Add LAL gel, either Sport or Wet Look, scrunch with flour sack towel, and plop
Diffuse 5 minutes, then air dry