First off, some definitions:
Studygram = study + instagram, a subculture on Instagram dedidicated to studying and taking notes in an organized and aesthetically pleasing manner. It was influenced by a corresponding subculture on Tumblr (e.g. my inactive studyblr).
Bullet Journal, “bujo” for short, is a method of personal organization. The system organizes scheduling, reminders, to-do lists, brainstorming, and other organizational tasks into a single notebook. While traditional rules of bullet journaling are outlined by Ryder Carroll, I find that bujo styles are deeply personal.
On my studygram @mathxmatics I primarily post pages from my bullet journal and planner. I also get abundantly excited about trying new stationery and pens. Luckily, keeping journals gives me an excuse to use all my stickers, washi tapes, brush pens, highlighters, and inks that I hoard up in my office.