In their extensive comments on this answer, V2Blast explains that including yourself in the area of effect of a thunderwave is possible, but asks, perhaps rhetorically, why one would ever want to.
Some immediate uses that spring to mind are a low-strength caster using it to escape the effects of a grapple, entangle, web, or any situation where forced movement would be helpful.
Regardless of why one might want to do it, however, the question remains - if one targets oneself with thunderwave or other forced movement spell, can one be moved? Thunderwave says
On a failed save, a creature takes 2d8 thunder damage and is pushed 10 feet away from you.
The question for me is, can you be moved 'away from you' and if so, what direction would that be?
This answer to this question somewhat blithely assumes that you can, but does not explain why or what direction that would be.