I've found that a pencil gives the best, natural finish and when it has a fine point you can get a very neat point to the brow. The pencil I always go back to is the Soap & Glory Archery Pencil in Blondshell and the fine means you can almost draw in hairs which I really like. You can also brush the brows into shape with the other end so there isn't too much product build up. The shade Blondshell is the perfect match as it isn't warmed toned and has an ashy colour to it.
I like to set my brows in place with something since it makes them stay in place longer. Although I do like the pencil on it's own, using the Essence Make Me Brow in Blonde adds an even colour to the brows as well as helping to keep them in place. This also isn't too warm toned which makes a great match for blondes. I find I can't get enough definition to the brows if I just use this but when paired with the pencil it's the perfect finish.
I really like this combination of products and it's a quick little routine that gives a really nice, longwearing look to the brows. What products are you using to do your brows at the moment?