Since I'm not sure whether this advice would be welcome in a recent discussion, I'm just going to start cold by describing something which has worked for me.

In an initial post, I explain what kind of advice I'm looking for, and I'm specific about preferring advice from people who've gotten improvement in [specific situation]. I normally say other advice is welcome, but you'd be amazed how little of it I get.

I believe it's important to head off unwanted advice early. I can't remember whether I normally put my limiting request at the beginning or end of a post, but I think it helps if you can keep your commenters from becoming a mutually reinforcing advice-giving crowd.

I suggest that starting by being specific about what you do and don't want is (among other things) an assertion of status, and this has some effects on the advice-giving dynamic.

I normally do want advice from people who've had appropriate experience. Has anyone tried being clear at the beginning that they don't want advice?