(This post was given away by a friend on Facebook but here are my thoughts on the topic.)
Another issue that I often see about stage makeup is dancers appearing to have no eyebrows.
It's a little known fact but eyebrows are VERY expressive and will convey the emotions from afar. Just stand in front of a mirror and do different facial expression and notice how your eyebrows change.
I'm naturally blonde under this mane of black hair so I have to color my eyebrows or else it looks like I have none. So I'm covered in that I HAVE to work on my eyebrows every day.
Now, if you have your natural hair color (or a color close enough to your eyebrows anyway), you may feel like you don't need to do anything to them. But that is where the pitfall is: even when I would have my eyebrows dyed, I needed to fill in my eyebrows... and everyone needs to!
Given the amount of makeup that we were for stage, the eyebrows, being fine hair, will just virtually disappear from your face. I'll do a full blown entry on eyebrows (which is an area where I'm still improving my skills on) but, at a high level, you just need to fill them in. You can use an eye shadow color and an angled brush (works the best to not apply too much) or a pencil that is in a shade close to your hair color and just apply the color over your eyebrows. That's all that you really need to do and then your eyebrows will be visible again.