HITs will often say they're qualifications in the title or the description. Just adding the word "qual" or "qualification" to your include list in HIT Finder/Forker/whatever can help you spot quite a bit of stuff. For everything else you just have to keep your eyes open. A lot of good quals come from qual batches. Inspect every batch you come across to see if it looks like it might be a qual batch. If a batch posts and you don't qualify, check if it has a qual test on it. I feel like 95% of this work is just being attentive and available at all times.How do you find and qualify for closed Quals? I have been doing this for a couple of years and occasionally get invited to HITs via email but not very often.
As a lurker, I would like to thank everyone for their contributions.