Seven summer music ideas, plus 1 bonus:
1. go to concerts!
2. make a recording/video of all of your pieces from Guild!
3. compose a piece! Record or illustrate it!
4. orchestrate an old or new piece, using notation software!
5. play for your family and community!
6. learn a concerto movement, or learn a new favorite piece (sign up for summer lessons, if you haven't already done so)!
7. sight read through a book or two that you already have, or a new book (I have suggestions!)!
8. Take one of your old pieces, and reharmonize the melody (your music theory and analysis would serve you well!). Or take the harmony/accompaniment, and rework the melody in your own style.