I prefer opening a window when it does actually cool things down. Next would be a fan so that it's only directed at me instead of cooling the whole place when where I am in the only place that needs cooling. And last I'd use AC when it's really hot or I'm with a bunch of other people.
To be honest, I don't have AC right now, or a fan, but I'm usually not too bad about heat (plus in I'm France right now, the temperature has been in the 90sF but nothing more so it's not that hot). When it's hot I close the blinds and open the window. It does mean having to turn the light on sometimes though so I guess you can't do that either without using electricity.
But when I'm in California, I'm with my fiancé who gets hot super easily. What actually happens is that he turns on the AC and I wear a sweater and a blanket because he puts the AC at 60 and that's way too cold for me.
In winter I don't like turning on the heat, but I hate having more than 3 layers or so on, so I wear my thin Canadian underwear thing (a polar shirt and long johns) then clothes then a robe, and I turn the heat on the rest of the way for me to feel comfortable.