I have been relaxed since I was 10, and for about 90% of the perms I have received, I have put them in myself. Since I have found LHCF and have started stretching, I find that moisturing my NG thoroughly (mainly with water based moisturizers like NTM and rosewater/glycerin mix) for the week up to self-relaxing helps to work through the new growth. This last time I was 15 weeks and these are the steps that I used:
Part hair with fingers (I had to be very gentle in the kitchen area where my NG was like a forest), I based my scalp, forehead, ears with Summit Sensitive Scalp Base.
I then apply EVOO to my the middle of my already relaxed hair and to the ends to protect it from when I rinse the relaxer out.
Section hair into six parts (part down middle of head and section both sides into thirds), also using my fingers. Secure sections with small ponytail holders.
I believe the true key to my success with self relaxing is that I apply my relaxers with a perm brush.
http://www.amazon.com/Hair-Color-Brush-brush-salon/dp/B000TGEX1C.
I start with my most course section and part small sections with the end of the perm brush. Apply to new growth then continue throughout that small section then move on to the others accordingly.
The brush not only allows me to control the amount of relaxer I am using, but also to limit where the relaxer is being placed. For the back of my head I use my fingers to feel for the demarcation line. the parting in small sections with the end of the comb allows me to be able to ensure I get all of the good spots too.
Once all is applied it is important to work it in. I have become very good at keeping my application time to 10 mins. I don't know who first suggested this on this board, but I think it is a good idea to practice applying the perm with conditioner first. That way you can get an idea of what works best for you.
Sorry this is so long. Hope this helps!