I usually squeeze out most of the water in my hair with a microfiber towel, then apply my products, then plop with another (dry) microfiber towel for awhile. Then, I let the plop down and wait for my hair to be about half-way dry (I don't diffuse, but only because I'm lazy). Finally, once the hair is half dry, I almost always apply some KCCC. So, yes, I for one do apply products before and after plopping. This works great for me when I want my curls to be tighter.
The Smasters method does something like this along with diffusing, and a lot of people swear by her method. There's a thread on the Smasters method around here somewhere... I think it's part of the "techniques" sticky?
Medium/coarse, low porosity, dense, mix of 3s Cleanse: SM Moisture Retention, Elucence MBC, KC Come Clean
Condish: Giovanni DL, Cure Care, Ion Treatment, GVP Balm, AOHR
CG (again) since Nov. 2012
Protein: AOGPB, CNPF, SSRPT
Stylers: KCCC, SM Souffle, AOMM, SS CEJ, JCRR, JCCC
Trying out steaming!