Thinking of leveling up as a Restoration Shaman? It's a good way to learn to heal as you go — and it's a lot easier than just switching specs at level 100.
I run one or two dungeons a day. I used to run more, but once my gear got better than anything in them, it wasn't really worth the effort beyond the dose of garrison resources, and now I'm mostly running that second one out of pure stubbornness.
There's an anecdote I like to tell about the first dungeon I ran at level 100.