Where can we find the citation number of our published article?

Where can we find the citation count of our published articles?

Usually I use Web of Knowledge by Thomson Reuters Science:

• Go to the Web of Knowledge.
• Click on the tab of Web of Science.
• Click on the sub-tab of Advance Search.
• Use your name and some restrictions (e.g. AU=(Cheng, YJ) AND OG=(XYZ))
• Double-check and exclude the articles not published by yourself.
• Click the Create Citation Report on the up-right corner of the first article (if you still cannot find it, press Ctrl-F, and type create citation on that webpage).
• Click and you get and play around the report.

There are also free citation count search engines:

• Google Scholar
• Google Scholar Universal Gadget enables users to search for the total number of citations of author(s). It provides a total citation count, total number of cited publications and Jorge E. Hirsch's H-Index.
• Microsoft Academic Search

Related articles: 

• A plot of my citations in Google Scholar vs. Web of Science using R! is a blog compared the citation search capability of Google Scholar and Web of Knowledge.