I worked hard on content for my website for months, until it reached first or second position in SERP for search for 'kw1 kw2 city'
I was disappointed by low organic traffic. I kept mulling over changing 'kw2' to a synonym, but thought 'why upset the apple cart?'.
One restless midnight, on 27 Feb 2010, I mustered courage and took the decision on drastic change : out went 'kw2' in body text, titles and tags, replaced by its synonym.
I am intrigued to note that even today, 7 March 2010, my site is ranked No 1 or 2 for 'kw1 kw2 city' and 33rd position for 'kw1 kw2 country' :)
So my advice is to ago ahead and take some risk once your website is ranked high and gets page rank 2 or more
[edited by: tedster at 4:27 pm (utc) on Mar 8, 2010]
[edit reason] changed words that identify the website [/edit]