It is almost always a combination of a few items. I have to first anticipate a need that is not being met. Second, I spend a lot of time researching all of the oils that might be appropriate to support this need. Third, I work intuitively to choose the oils I want to work with, looking always for the blend to feel “balanced”. Fourth, I try various combinations over a course of at least a few weeks, until I am ready to let practitioners and others test the blend for me. It can take, in its entirety, weeks to months!