I judge the quality of a tag by looking at what it's going to link to. It's going to end up as a link to a list of hubs, so I just follow a few steps to choose good keywords:
1. Choose about 15 keywords that describe my hub at varying magnitudes... from something specific like "hubpages rss" to something general like "internet".
2. Go to the hubpages lists for those tags: http://hubpages.com/tag/InsertTagHere/hot - this is the page that the tags links on your hub will point to. If there's nothing there it's probably not a good tag, and if what's there is totally irrelevant to your hub it's not a good tag (you might write a tag about organic livestock feeds while the tag page for "feeds" only shows information about promoting your web site with RSS Feeds ).
3. Weed out or change the bad tags (unless it's a critical niche topic for your hub that no one has written about yet) - usually it's a matter of finding synonyms and changing the pluralization to find tags with more hubs. The Related Tags cloud next to the search will give suggestions for hotter tags.
4. Stick to about 8 to 10 tags. If you have written on the topic previously, be sure to include some of the same tags because if you do well in a topic you can appear in that tag's "Top Hubbers" list.
Your hub has a chance to appear in the hot/best/latest lists for the tags that you choose which could get you more readers. However, if you're the only hub linking to that tag page and therefore the only result it's pretty meaningless unless it's a niche word that your readers would search.
Also, the hot/latest/best lists for popular tags are probably syndicated elsewhere as well so you might get some links outside of HP.
Someone correct me if I'm wrong but I don't think you help you or your readers in any way by using long or peculiar tags that no one else would use.
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Howdy Pardners!The contest is alive and kickin' and if you'd like to kick it, feel free to do so here!If you want more official-sounding info, and if you want contest-related updates, check out this thread instead:...