just simply create your profile on Google scholar, enter your publication properly, they will automatically update your citation list with h-index.
h-index applies for both authors and journals. Its similarity with Impact Factor is that it too depends on citations. However, formula for calculation is different. An author's personal h-index will indicate the overall quality of his work on the basis of no. of citations received by his papers. An author's h-index is calculated by Google scholar
Hi, if you are interested in Thomson Reuters h-index, then search your name in author's search at Web of Science, refine the result to include only your work and then click "Create Citation Report " on the righ side of the screen.