A few things that I do:
1) I feel like most of my hair styles look the best on stretched and smooth hair. Doesn't have to be straight, just smooth...so I use roller sets as my base. I maintain the body/curl with 1-3 bantu knots. 1 knot=loose curls while adding more gives tighter curls. I alternate between them all just to switch things up here and there.
2) Learn how to braid or until you get the hang of it...just twist. They add a really nice focal point to any style.
3) Accessories. I love banana clips...They spice up ponytails while letting you showcase your length.
4) Google. I google hair styles often and just practice till I can get the hang of it.
You have seen most of these styles in the setting to success thread already. lol