A few thoughts. . .
Basically, the less stress on your hair line the better. My hairline is naturally fine-haired and thin. It's alway been that way. Problems came when braiders tried to "catch" everyone of those fine hairs.
If you can't resist the urge to braid I'd suggest larger partings with the least possible hair fed into each one. Same business with any type of extension (twists or braids).
If you wear your hair up in a ponytail or bun, I'd suggest you leave the first couple of rows out in the front and add them last. For instance, you could wrap them around the bun or bobby pin them in separately, etc. The trick is that you don't want the fragile areas to be a part of any potential tension.
Apply your treatment for the thinning at night and when you cover your hair with a satin wrap at night, make sure that there's not tension on that area.
p1