When I first started out 8 years ago, I found eyebrows to be a bit scary... but it just takes practice, practice, practice. I have never used the vaseline trick (wasn't taught it in school). I do apply a thin layer of oil. Then apply a very thin amount of wax where I want it... if I'm nervous about taking too much, then I just don't go right up into the brow, and do a bit more tweezing. I pretty much always wax above the brow... it just makes them look so much cleaner. There are some clients that don't need it, or don't want it, so I don't. But generally I do.