Have fun with your hair! Add accesories, add accent braids, combine styles, but HAVE FUN. Here are some more ideas.
Modified Gibson with Marian Braid.
Marian Braid with Circlet.
Movies and TV shows are also great places to find inspiration--you'll often find that the styles are simpler to do yourself than you'd think. Some of my favorite shows to steal from (at least for this era) are Lord of the Rings, Robin Hood (the BBC show and everything else), Merlin (again BBC), Chronicles of Narnia, and Ever After. Here are still more pictures to get your thinkers going. And if you find something you'd like to do but can't figure out, bring a picture to rehearsal and we'll see what we can do!
Just plain historical is also good, surprisingly enough. One really fun one (instructions here) is Elizabethan Hair-Taping. Completely accurate, fun, functional, and pretty.