Acccttttuuuallly....this can be ignored, since I just figured it out myself.
Now I'm left with two questions:

Can somebody help me make a trigger so that I automatically mend any broken limbs?

and

What do most people make triggers/alias/etc. for?

Hmm... Well, I have an alias for my most common attack. That's always a smart one. Also, having one outrift and use herbs is nice. If you PvP, lots of moves can be effectively aliased.

Triggers and aliases are much, much more complicated than simply creating one to help you cure an affliction right away. I (and a lot of other fighters) have a complex system of aliases, triggers, variables, and timers to help me stay alive. For example, while having a trigger to cure a broken arm is extremely useful, what would happen if you receive two broken arms in a row? You can only cure one at a time, and then you have to wait until you see the 'you may apply another mending salve' (or something similar) message before you can cure the other one. Complex systems track what afflictions you have and prioritize them, track whether you are able to apply a given salve (or eat an herb, sip your healing elixir, etc), and then prioritize what order they should be cured in. The system then executes the cures in order whenever you regain the ability to use the cure you need.

That is a short (and semi-complicated) rundown of how people use triggers to cure. I also use some offensively - I have a variable that tracks my current target. I have an alias so I can type t to change my current target. Then, I have a short alias that will attack my current target (for example, when I was a mage I used ps to POINT STAFF @target).

A lot of these things are too complicated to do well in Nexus, but there is still a good bit you can do! If you have any other questions about how to set things up, post here and we'll see if we can help you figure it out.