Welcome to the Deep End

My daughter is a freshman in high school this year. These past couple of weeks have been a blur. I'm happy to say that my daughter seems to have adjusted well. I think I'm still struggling a bit.
I was expecting a little more hand holding... for me, not her. Not only did we not get to meet teachers at the open house, I had to stop random people to figure out basic things like car line and gym clothes.
The school has a helpful facebook page, but you have to sort through all of the unofficial pages before you find the right one unless you happened to have searched the school's website to find the link (I noticed it a little too late). 
This year there is so much new stuff to learn.... for parents, I mean. There is a new lunch account site, Angel has been dropped, and the new Its Learning site for information (apparently, proper punctuation is not one of the things learned). I feel like I'm back in school having to do research just to figure out all of the different fees I need to pay, sites I need to sign up for, and meetings I need to attend. It is exhausting. 
I seem to remember college freshman orientation being a lot more detailed than high school has been, but I was younger then, so maybe it is just me.
Here are a couple of tips I learned:
1. Ask an upperclassman. Even though there were no teachers around for open house, there were clean cut, responsible looking students there to help with lockers and such. Instead of trying to find a locker near friends, my daughter handed her schedule to a junior and asked what hall would work best. She can now fit in 4 locker breaks where most struggle to fit in one. 
2. Ask a booster parent. Booster moms are like the room moms of high school. They are there all the time helping with band or football or something. They know the ends and outs of everything. They may be there pushing a club or fundraiser, but they will gladly explain whatever confuses you.
3. Ask the janitor. The schools are so huge and so spread out that any and all shortcuts must be used. A very helpful custodian pointed out to us how back hallways connected and which stairways always seem less crowded. It proved to be invaluable advise on the first day.
4. Read the website as if it were a book. Cover to cover. If you don't then you'd never find the summer book list, the social media links, the completely different site that band/team/club operates. It is all there, but you have to really look for some of it. 
5. Get a Paypal account. For the first week, I feel like there was a new thing to buy or fee to pay everyday. Thankfully, most everyone seems to have started using Paypal to accept payments. It is so much easier than sending your child in with 5 envelope that they have to get to the right teacher for the right thing. It will be one less thing for you both to worry about.
Those are the 5 big things I've learned in my first week. Any tips of survival you can share?