Watch the 7 Note Permutations online guitar lesson by Richard Hallebeek from Scale Creativity Guidebook
You can take the notes in a 7 note scale and turn them around in many ways. This might sound mathematical, but it’s actually really helpful and gives a lot of inspiration and new melodies that you might not have found before.
I'll also exercise your fingers to move in new ways. In the booklet, there are over 5000 examples of the different orders of 7 notes, surely giving you enough ideas to play for a lifetime! This is also a nice inspiration for composition if you are stuck with an idea and can't find a melody.