As some of you know, I'm absolutely eyebrow obsessed. This comes mostly from my crazy Russian eyebrows (courtesy of my father) that makes me look like Groucho Marx if I don't take care of them. And it's also from the fact that once I did start to take care of my eyebrows, I realized how much of a difference shaping your eyebrows makes. By just removing the stray hairs in your arch, you can open up your eye and give yourself a mini-face lift. My favorite trick if you have unruly brows is to trim them on a regular basis using mustache scissors, plus a bit of wax or pomade to put them in their place.
Since I've don't have a problem with thin brows, I never got to play with eyebrow shading and definition. Now that I'm working as an eyebrow/make-up artist I'm starting to learn the magic of shading to help define eyebrows. I'm not a huge fan of pencils since they tend to give a harder line and look. So I'd recommend investing in a small angled brow brush. MAC makes a great one - 208.
You can use your favorite brown shadow with the brush or invest in a brow shadow palette. Smashbox makes one called "Brow Tech" which includes wax to help with brow flyaways. I recently discovered MakeupByCheri tutorials on YouTube where she has a great one outlining the steps to creating the perfect brow shape. Also for everyone who gets a brow shaping by me, I'll finish the session with a complementary mini-class on eyebrow shading!