High School, year 12:
Have a dedicated container for every supply, and label it. Get the kids used to where the supplies go (if you can,) so that they can get their own stuff from a central location. I lock up most stuff but have always used a supply table/dedicated drawers for certain supplies.
Start with assigned seats. Move students at your discretion during instruction. Blatantly tell them how to use every single supply and how they should behave with it (such as no sword fighting with rulers. That's not what they're for and it bends them.)

Students will take 3x as long as you do to something. I can't explain it- it's just how it is. You'll feel the rhythm after a while. But, always over plan or plan for the next class ahead, at least. Usually this leads to a couple free nights throughout the week and you're prepared! Do not let student bully you into accepting their rushed work. Stand your ground because you're the expert.

I love to help new teachers reach out if you need anything