I'm a relaxed 4a/4b, and what I'm doing at the moment is:
Every few days (in sections):
1. Moisturize new growth with Care Free Curl.
2. Moisturize my ends with Qhemet Amla and Olive Heavy Cream.
3. Seal with Castor Oil, and bun.
I leave the bun alone until it's time to re-moisturize, which is when I take down my hair, section it, detangle it, and go through the whole moisture routine.
Every two weeks:
1. Separate hair into four sections, and braid.
2. Apply Aphogee 2 Minute Reconstructor for about 15 - 30 minutes.
3. Shampoo with Organix Tea Tree Mint Shampoo.
4. DC with Nexxus Humectress, for at least an hour. I do it overnight mostly though, because I've become way lazy with my hair.
5. Use Porosity Control.
6. Apply HE LTR Leave-In, Chi Silk Infusion, and a little bit of Castor Oil.
7. Rollerset.
8. Lightly press roots.
I'm 14 weeks post, and I'm going to keep on stretching until I feel like relaxing. I've been doing this routine since April, and I like it because it really cuts back on how much I have to manipulate my hair.
But once my hair is re-touched, I'm going to go back to not using heat and DCing at least once a week.