I have been looking back at some of my old sites to decide whether to ramp up the work on them, or send them to the website scrapheap. I'm in reorganizing mode and have decided to pare down to just a few productive sites. (A few, by my standards, is 15-20).
So today, I looked at the very first website I built (other than my personal site). I haven't paid any attention at all to the site in over 2 years. So, the first thing I did was run a site: command in Google to see what it showed, and I was surprised to see mostly url-only listings. So, off I went to the site and what did I immediately discover? The page titles, meta descriptions, and meta keywords were exactly the same on every page! I was horrified! Granted, when I built the site, I had no knowledge of SEO, but I still can't believe that in all this time, I never once noticed that. Oy, what a doofus, eh? The rest of the on-page optimization was decent, although I'm sure it was by accident rather than by design.
This site may still end up in the scrapheap, but before I decide to trash it, I will first fix the obvious SEO problems and see what happens with it. I'll give it a few more months and if it is still unproductive, then I will dump it. But it will be a nice little SEO test to see if making some very simple changes makes a signifcant difference in its performance or not. I don't intend to put any serious time into the site, and I will not be doing any kind of off-page optimization, because I don't think that the site is worth the effort. But I can afford to spend a small amount of time making the on-page changes. Time will tell, and you will know when I know, if the site thrives or burns.