Since much of my work revolves around §508 compliance, I spend a lot of time restructuring tags in Acrobat. Unfortunately you can’t just handwrite out these tags à la HTML, you have to physically manipulate a tree structure. The Tags panel is very conducive to mouse use, and because Adobe is Adobe, not very conducive to keyboard use. Many important tasks are missing readily available keyboard shortcuts, and it has taken me a while to be able to largely ditch the mouse1 and instead use the keyboard to very quickly restructure the tags on very long, very poorly tagged documents.
A couple of notes – this assumes a Windows machine, and one with a Menu key2. While I generally prefer working on MacOS, I’m stuck with Windows at work, so these are my efficiencies. Windows may actually have the leg up here, since the Acrobat keyboard support is so poor, and MacOS does not have a Menu key equivalent. Additionally, this applies to Acrobat XI, it may or may not apply to current DC versions. Finally, all of this information is discoverable, but I haven’t really seen a primer laid out on it. If nothing else perhaps it will help a future version of myself who forgets all of this.