What kind of hair product should I use?

I have dry, frizzy, thick, curly hair that has a mind of its own. I always wear it up, but this school year i wanted to wear it down but if i don't put anything in it... i get an afro and my hair is all poofy (i hate it). When my hair is damp it's perfect and i love it but i don't know how to keep it that way when it dries. Any advice?What kind of hair product should I use?
Olive oil is the best thing I've found for frizzy hair! I have struggled with frizzy type 2C (wavy coarse) hair but almost curly all my life. Now it's seriously smooth and defined! I am so shocked, I just want to get the word out! Just apply it like you would gel; while your hair is still damp; making sure to get the ends really well. (I use a small palm-ful about the size of a quarter around.) Use it for touch-ups on the days you don't wash. After a few washes; you won't need as many applications or as much oil. You'll see! (OH, and if it seems to get too oily ... just wash it, but apply the shampoo to your hair first and try to lather a bit before adding water.) I really am just so amazed how well olive oil works. And it is very inexpensive because a little goes a very very long way. I put some in a tiny spritz bottle about 3 inches tall and use that to spray it into my hand a little at a time and I don't have to refill for 6-8 months!