Lo que Kay había corregido está bien. Tambien, yo añadiría que dichos más expresivo ayudará la claridad.

In addition to Kay's corrections, I would suggest abbreviating to more colloquial speech that helps get the point across [which is, to ask the question]:

"I think I spend too much time in the shower contemplating the world's origins, UFOs, and a lot of other things. How can I shower faster?" 

Esto quire decir "Pienso que paso demasiado tiempo mientras ducharme, contemplando las origines del mundo y UFOs (entre otras cosas). ¿Como puedo ducharme más rápido?" 

How to take a shower faster?

I think that when all of us are taking a shower, we always think about the world's origins, UFOs , and a lot of other things more and that's one of the worst things reasons that to make me take a longer shower, could you give me an answer to this? haha :D