I like to play aa or kk all in preflop, especially when it's the first period of the tournement. When I'm in the late stage of a tournement I don't really know how to play those hands. Often I only raise, just that I have a caller, but I think this is far more risky than to play all in preflop, because many players can call.
+1I play it like normal hands standard raise 3x or 3bet. U could slowplay but only on loose table when u think that probably someone raise you. Slowplay is bad