Ok a couple of followup questions:
What about shortening the title tag? Currently it's "How To: Build a Custom Ergonomic Computer Desk - Blog - Projects, Ideas, Inspiration, Kee Klamp, Fittings". The stuff at the end was added by the CMS and I want to shorten it to "How To: Build a Custom Ergonomic Computer Desk". Is there any fear in shortening the Title tag when I am refining it and make it more potent (e.g. getting rid of the crap)
**What about changing the image file names and adding alt tags when they are nonsense or garbage? **
Here's an example of what's there now:
src="http://farm4.static.flickr.com/3039/2770274783_e9c2df4616.jpg"
width="500" />
You can see it's just junk. I could see improve the meta substantially and also giving the files real names and putting them on my own CDN. Doing this of course would cause google to see them as different (but better?) images.
**What about adding a "finish" picture to the top? **Maurizio mentioned not editing the top of the page. But what if I wanted to add a nice "finish" picture to to the top? Would that cause any issues?
**What about making these changes incrementally? **Would it be better to make a little change. Like change an image a week or something silly like that, or make all the changes at once.