I only started counting the WHS in the last three years and have since to concentrate my travels, including business, to WHS. I have covered about 15 sites in China, 8 while back in the US, as my top countries.
Having not achieved most of my lifetime goals, I set a goal of reaching 200 WHS when I turned 50. I need to go on a pace of about 15-18 a year, given that my physical conditions are not what they used to be. 2005 was a good year with 18 WHS visited. Really too busy in 2006 to travel, but finished the year with three more sites around Kyoto and Nara, Japan. 2007 was a better year as I covered the seven points between Moscow and St. Petersburg and went to Tibet in the summer. In 2008 so far i covered six sites in Tunisia and two in South Africa, that makes my 100, half way towards the 200.
What I regret is that I did not take full advantage of my business travels when I used to cover South America in the 90's, e.g. wasted a week in Peru without doing any Inca sites.