In pure traditional watercolors, there are a lot of restrictions for what you can and cannot use in those types of paintings. Recently I came across many artists that break away from the traditional watercolor look and use all types of different techniques to enhance the look of their paintings. 

One technique I came across was the use of watercolor pencil, which was added to a traditional watercolor style. Using a pencil to do small details and then wetting the pencil marks you add to the painting looks almost identical if you were to add it in the traditional way using a brush alone, but in some ways is easier to do.

Using a watercolor pencil with a very sharp tip can make it easier to give you lines and details that are a bit harder to get when using a wet brush.

Get yourself a set of watercolor pencils and play around with them and see what new sort of style you could add to your paintings.