Members of the Boy Scouts of America are taught to be thorough, methodical, and analytical about each situation they encounter. In turn, scouts are routinely encouraged to identify one positive experience (Rose), one negative experience (Thorn), and one new goal or insight (Bud). Adapted for use as a design method, this structure provides an opportunity to analyze a set of data or help scope a problem by revealing focus areas, allowing you to plan next steps.
This is a simple and versatile method to employ. You can frame your ensuing activities by documenting observations or opinions on sticky notes as positive, negative, or having potential. Alternatively, you can code various items that are represented on posters or diagrams by tagging them with sticky notes as Roses, Thorns, or Buds. In all cases, the use of different colors for each note helps you see and consider emergent patterns later on.