Hi
Article marketing is such a big part of my business. I just love it. Here are a few recommendations. Also, I just went to a teleseminar on Friday for EzineArticles. I'm not sure if it's archived or not, but if it is, I highly recommend listening to it. It was awesome. I learned a great deal.
For keywords, I totally totally agree on the title. To me it's the most important thing to consider. I normally try and get them in the first few words of the title too. I'll also do a keyword tool analysis before. It's amazing how even adding an "s" can make a difference in how many people search on that term. It usually only takes 1/2 hour to do this too, so it's well worth it.
I also try and get keywords at the top of the article. I'm not sure why, but I do find I get better results when I do. I'll put them throughout, but try and get the heavy hitters up top. Definitely in the summary too. Just make sure you don't make the summary all keyword driven. Have you ever seen those, where it's all one big keyword after another. YIKES!
Chris from EzineArtlcles talked about bolding in the articles. He recommended bolding the topic headings. Like if you give 5 tips, you can bold the title of the tips. That might be a good place to squeeze in a keyword.
One thing I didn't know was that with articles you submit through EzineArticles, you can check out the keywords that drove people to your article from your article account settings. That should be really a handy tool.
Hope this helps!
Diana Ennen
Virtual Word Publishing
www.virtualwordpublishing.com