proper place to set environment variables?

[John Gabriele]

Hi,

I'm running as my desktop a stock Debian "Testing" (which is currently
aliased to "jessie") system with Xfce 4.10, and log in graphically via
LightDM.

Where is the proper location to set environment variables? That is, I
tried doing so in ~/.profile, but that file does not appear to be
sourced when logging into the desktop (I think it may when logging in
via text console though).

Thanks!
-- 
  John Gabriele
  jgabriele at fastmail.fm