I use blogging to get out the word about what I am up to and what my plans to draw a little attention to my ventures. I am learning to keep a friendly but interesting tone to try to build readership and try to include enough good tags in the body of each post.

I am concerned about keyword density being TOO great. What is a good formula or dispersal for key words that still maintains tag rich content? How many times in a 500 to 900 word entry would it be safe to repeat tags/keywords?

i would go with the method. don't try to over do it. if it seems overdone, then it is.

If you overdoe it then google will think you are attempting to get every type of related field and they will overlook them, i would say in a 900 word entry maybe 10 times tops?

When I was first worried about keywords, there was a site with a test you could use on articles. Basically, you just cut and pasted your article and it gave you the stats back on it. I didn't need it for long and don't have the url anymore but I'm sure you could find one by googling. It's kind of interesting to get a feel for things.

A lot of the top ranked sites only have a .3% density which is far to low. I would say 1.5% would be a good denisty. It is enough to be highly ranked for it but it wouldn't be considered keyword stuffing by google.