Auto pilot. Did you ever feel like even though you are "making art" you were on auto pilot. A show is a show is a show. Each one is a little different and moving in it's way, but eventually you have to organize and pump them out each in a similar fashion. Which goes something like this:
Listen to music/read script/watch movement.
Have initial emotional reaction which leads to a visual element.
Historical research/contemporary research.
Meet with director to understand their intentions.
Do initial visual boards and sketching.
Talk to director about initial visual boards and sketches.
Do more sketching and research and collages.
Meet with director again. Decide on costumes.
Change designs do to conflicting body types.
Pull rehearsal pieces.
Buy fabric and materials.
Meet with the director again.
Decide what to build and what to rent.
Talk to makeup artist.
Write thank you notes.
Donate built costumes.
Find another job.
And if you have nobody in place to do these things with or for you, you do them yourself. In the past year, I designed 8 shows, worked in production on 2 premiers, and remounted 10. I've learned a lot and I think for the next few months I need to lay low and recoup and let all the hands on experience sink in.