I'm not a stylist, but just going by what I've read on the forums, I know you should do a PT before you color, so your color comes out more even, and then after you color, give it at least a week before doing another one (or else the protein will kind of replace the color and you'll lose some of that color). Also, doing a DT afterwards is also supposed to help with damage.
Hopefully, others can chime in (either to correct me or give more advice). Hope this helps.
2b, fine texture, normal porosity & elasticity (CG as of 12/2011)
UFD Rich & Funky
VO5 Kiwi Lime
Tresemme Naturals, Aubrey Organics GPB, Ion Effective Care, MillCreek Keratin
IAgirl's PT, GVP CB
KCKT, Cure Care, CJ CCCC Lite
Curl Keeper, As I Am Jelly, UFD Curly Magic, CJ Curl Queen, TIGI Strong Hold Mousse
^^ day 1 of going CG; avatar = 6 months later