Hello! I am speaking as someone who is trans and has boobs and knows a thing or two. I've noticed lackluster interpretations of binding and lackluster advice about binding in a lot of things.

First of all, before you learn what to do, learn what not to do.

1. Ace bandages/compression bandages.
   Use these/give them to your character(s) and I'll appear in your home at 3 AM and give you a binder because this is not safe. This is a good way to hurt yourself, actually. I mean, unless you want to get crushed, bruised and potentially have permanent harm done to you body.
2. Tape products.
   Tape is a good way to lose actual skin. Every time you take it off, it strips off layers of your skin. Prolonged use actually causes wounds that can, in extreme cases, leave permanent scars. Don't use it.
3. Use a binder incorrectly by:
        Wearing it for more than 8 hours.
        Sleeping in it.
        Wearing it during sex.
        Wearing it to exercise in.
        Wearing a binder that is too small.
        Binding every day.
        Getting your binder wet while it's on you/wearing you binder while it's wet.
   Doing these things can result in serious hard to yourself, including being crushed, bruised and potentially having permanent harm done to your body.

Here's what you should do instead of all of that!

1. Wear a binder for less than 8 hours. 8 hours is the maximum.
2. Wear a high impact sports bra instead of your binder sometimes.
3. Only wear your binder a maximum of three days a week.

If you have any questions, let me know. I'll edit this with each one.