There was this one time I was flying a Cessna 150. Take-off and climb out was uneventful and once up to 7500MSL, the ground speed readout on the GPS was only a little bit less than the 95KTAS that I had calculated. My heading was a couple degrees right of track, so I figured there was a bit of crosswind. But then I cleared a ridge and suddenly I start to balloon a bit, so I assertively but smoothly push the nose down. After I got things trimmed out and the airplane settled its pitch attitude, I glanced at the ground speed and couldn't believe my eyes. 297KTS! About a half hour later, ATC calls me up "Cessna 123, traffic 12 o'clock, same direction, 1000ft above, an Aerostar". I figure they probably have a decent autopilot so as long as I can hold altitude it should be no factor. Sure enough, I spy their strobes and see them whiz right over my windscreen as if they were standing still. Checking the fuel gauges against the tach hours, I figured I had more than enough to skip my 2 planned fuel stops, plus the flight has been smooth as butter so fatigue is not a factor at all. After a couple of hours, I start my descent and the push gradually subsides. I let out a sigh of relief that with this much wind on the tail, there wasn't any shear. Three miles out, tower clears me #1 straight in. Except for the briefest chirp of the stall horn there was absolutely no sensation of a touchdown, a total greaser. As the nose wheel gradually meets the pavement, I could feel the paint stripes of the centerline rolling under it. And with that, I was also able to make the first turnout.
Well, you asked me for my best tailwind story. You didn't say it had to be true...