From the blog "Skyrim Notes to Myself"
Like others of my blog entries this one is on sticky notes. When I went to answer a question earlier today I noticed that my pencil markings were fading. So, I thought I had better put this here.
Let me introduce you to the Skyrim console: http://en.uesp.net/wiki/Skyrim:Console
When I hit a stuck quest I do the following:
1) use the console code sqt (showquesttargets). The console will then give you the ID for all of your current active quests. Use the pageup