Reincarnation
One of the most promising methods to confirm the existence of the reincarnation could be to search for parallels and correlations between the (well-documented) lives of famous persons in the history. A great advantage of this technique is that it does not require mystical or (at least in their current state) pseudoscientific procedures (like e.g. the use of the regression hypnosis for this purpose) to find the previous life of an individual, and also highly beneficial is the fact, that extensive analyzation and comparisons can be carried out on the various lives because of their eminent documentational level. Of course, this method has the serious drawback that it can be applied only to a very limited number of persons; however, (as a first step) this could be sufficient for the proving and the confirmation of the concept itself, for discovering the basic rules and regularities behind it and for encouraging us and (hopefully) the established science to conduct further investigations about this subject. In the following, some of the perhaps most conspicuous cases are presented (very) shortly (without any examinations or analyses), in order to demonstrate the potential of this approach and to illustrate the process of the reincarnation through concrete examples (the barely suspected or missing incarnations are closed in parentheses):
Note: it is remarkable, how similar the physical appearances of the various incarnations can be to each other, indicating that already the physique is not determined exclusively by genetical influences (not to mention the personality characteristics).