This is where imposing artificial limitations on yourself comes into benefit. Make a whole bunch of those decisions before you leave the house. Pick JUST ONE CAMERA, and JUST ONE LENS, and JUST ONE FILM. Have an awareness of conditions before you leave so that you don't end up in a fog bank with ISO 25 film and no tripod, for example, or ISO 800 loaded in your medium format on a bright sunny day at noon when you want to shoot portraits and can't speed the shutter up enough to use anything larger than f/22. I found that my several trips to Paris, Rome, Florence, and Mexico City with only a Rolleiflex made me take so much better photos because all the gear fetishism had been dealt with. I was making the best photos I could using what I had to hand, and instead of worrying about "I could do THIS if I had X in my bag" I was just making selective edits before I even clicked the shutter. I was seeing with the tool in my hands, and as it was a very good tool, it got out of my way and let me concentrate on taking good pictures. There's an internal editing process that happens when you take pictures - you edit so much before you even put the camera to your eye, let alone between looking through the viewfinder and actually clicking the shutter. I'm not saying you have to pare down your cameras to just one camera and just one lens (unless you want to - nothing wrong with deciding on a single tool as the best tool to fit your vision). I'd be a raging hypocrite if I did so - I've got a Contax 35mm SLR, a Fuji mirrorless digital (and what, 6 lenses now?), a trio of Rolleiflexes (two 2.8 E models and a Tele), an RZ67 (and five lenses), a Lomo Belair X-6/12, a Lomo LCA 120, a Speed Graphic, a Sinar A1, Sinar F, Sinar Norma 4x5 and 5x7, Canham 5x7, 5x12, 8x10, 14x17, and a bunch of other odds-n-ends - they're all tools that exist for different purposes. I just make conscious choices when I leave the house - if I take the 5x12 with me, for example, I don't also drag along the Rolleiflex, because they're two totally different cameras that require thinking in different ways to use, and switching back and forth between them is going to make mediocre the results from both.