Hi Katie,
Unfortunately I am not a hair pro, but I have bought enough hair products over the years to try and tame my unruly hair !! :7
I also use Aveda's Be Curly, and yes, you are right it is not enough on its own. I combine it with Paul Mitchell's Sculpting Foam (gorgeous natural, but firm hold hair mousse, brilliant for waves and curls), and I also warm up a little of Aveda's Anti-Humectant Pommade and apply that on damp hair. Then I blow dry with the diffuser, and I may finish with a little more of the Anti Humectant, or if I am going somewhere special the Aveda Self Control, scrubched in. I have tried curl up, but it didn't do anything for my hair.
I have used the serums, and found them to be too heavy for my hair, probably because a lot of them are mineral oil based, that make the hair lank. A serum basically is applied before blow drying (for example it helps to define curls and waves, and stops straightened hair becoming fuzzy, and cotton wool like) and it also helps to protect the ends of the hair from blow drying, but any styling product will give you protection.
I use Aveda because it is the only range that does not irritate my scalp.
I recommended Jillybean have her ends trimmed because without being able to see her hair, the ends might be in need of a trim, if the hair is looking fuzzy, etc. Jillybean may be growing her hair, and if so it is still recommended you get your hair trimmed every 3-4 months.
A deep conditioner isn't always necessry, but if hair is blow dried/goes swimming/ and is coloured a lot, then it is normally recommended. Sweet Almond oil make s a good deep hair conditioner, it is inexpensive, and completely mineral oil free. :7
Hope this helps Katie,
Anna