Pixel-peeping has its uses in RAW development and editing, of course, but an obsession over sharpness / detail / luminance noise / tiny amounts of fringing etc. is counter-productive and unnecessary, IMHO.
With that in mind, I offer three tried-and-tested cures:
(1) Shoot with lower-resolution bodies. High resolution sensors are one the major factors that have fed this pixel-peeping obsession, revealing every tiny flaw in lenses. Shoot with a 10MP K10D, or better still a 6MP *ist DL, and see if the obsession fades. You can always step back up to your high resolution cameras when you've recovered
(2) Shoot only with commonly-available, low and mid-range vintage lenses for a while. For me, this started a completely different obsession, albeit a rewarding one... to enjoy the overall rendering of film-era lenses. Whilst there's some wonderful old glass out there, much of it isn't heavily corrected, and resolution isn't always the best. Over time, you adjust your expectations with vintage lenses, and start looking for different properties, aspects and results in a 100% reproduction.
(3) Make your processing target to achieve good-looking images when viewed full-screen on your laptop or desktop PC at typical viewing distance. If it works like that, then in my book it's good enough. Actually, I aim to make my photos look good at 50% reproduction on my 17" laptop and 23" desktop monitors, but anything that looks good when viewed full-screen is still a keeper.