So like many people lately, I am leveling an alt with RaF, but ever since I got 60 on the alt, there is no reason to have the 70 around, so I decided to AFKV him some honor while I level, but I found that I am bad at multi-tasking, and the 70 goes AFK a lot. Here is what I did to fix it.
1. Run 2 WoWs, 1 for the alt, 1 for the 70
2. Join AV, run to where ever it is you stand to AFKV.
3. Go back onto your alt and continue to level, BUT, start a timer in deadly boss mods (/dbm timer [insert time here, I do 240, for 4 minutes] [insert name here, I just put it as my level 70's name])
4. You now have a nice little DBM timer in the middle of your screen, and when it gets close to finishing, it will move the bar and make it bigger, making it real obvious that you need to move your level 70 a bit.
I realize this is most likely not original, but i did find this out myself, and then wondered why I had never seen this before.
Also, on the subject of mods that help you AFKV, Power Auras is awesome. I set it to make a giant animation on my screen when ever I get idle / inactive. so I know to remove the debuff.
I also put my 70 and my alt into the same group, that way I can see any debuffs that go onto my main, and can see, even while leveling my alt, that my main has idle / inactive.
Sorry if this is a repost, just trying to help!