I'm 6 days away from 4 months post (16 weeks) and it is a challenge. I've been discouraged and really frustrated some days and others I feel completely confident that I will make it to 6 months (January). The key to stretching, in my experience thus far, has been the following:
*Pre-poo's: These help keep my hair strong, I like to use molasses, garlic, wheat germ, honey, evoo, etc for these to avoid breakage and excessive shedding.
*Oil rinsing/Hot Oil Treatments: Makes detangling a breeeeeze, softens like crazy.
*Quality deep conditioner: 'Nuff said. Regular DC's are a must, for real.
ETA: the above work exceptionally well on dry hair.
*Frequent Co-washing: Moisturizes and keeps NG and chemically treated hair soft.
*AVC rinsing: Helps in moisture retention.
*Quality moisturizer: 'Nuff said.
*Protective styling: Buns, bantu knots/knot outs, twists/twists outs, braids/braid outs, wigs/half wigs/weaves, scarves, etc.
*Keep manipulation, especially to NG limited
I've recently discovered scarf styles/head wraps/hijab similar to the following picture. It keeps the hair covered, can flatten the NG, tucks it away when I don't feel like "dealing" with it, and styling this way can really get creative.