* arrives late to the party *
Curly haired girl here! Mixed texture. I use Mixed Chicks shampoo and leave-in conditioner, and I alternate between microbraiding my hair and fighting with tangles. I've a lot of hair, though. I've heard twisting and diffusing is helpful, but I've never had the patience to try it.
Shameless Maya recently put up a video, however, that goes over four different ladies and their hair care routines. Heads up--they do show the girls showering, but just shoulders up! Anyway, it is a handy video, if you're trying to hunt for new ways to deal with your hair or want to compare.
As far as eyeliner goes, that's sort of a thing that you have to develop through trial and error. I don't use eyeliner that regularly (hello, allergies!) but I highly recommend getting a high quality waterproof liquid liner. That said, I subscribe to the winged liner theory, so a good, sharp, line is super important to me, and you'll never catch me blending eyeliner out. I know you're supposed to use concealer to help guide where your line should go, but I'm lazy and reckless, so I usually just grab a piece of paper, line it up with my lower lid line, and just make my eyeliner run into it. This is probably not a good idea (hello, papercuts!) but it's only ever failed me when I got too much liner on the paper and it soaked through. *shrugs* I'm probably not a good role model.