Nelson Tansu was able to increase his h-index from 20 to 43 in just 3 years by employing strategies like heavy self-citation of his own work, encouraging students and co-authors to cite his papers, publishing the same work multiple times with self-citations, presenting many non-refereed conference papers containing self-citations, rapidly self-citing in the first two sentences of papers, becoming an editor of journals to coerce citations to his work from authors, and forming citation clubs or cartels with colleagues. Some of these strategies have been criticized as questionable or coercive ways to artificially boost citations and metrics.