I recently had my throttle stick wide open at around 90mph. Thankfully I was on a fairly open stretch of road but still eye opening to say the least.
To avoid the same thing happening again I took a look at the linkage between my throttle cable and my Jenvey throttle bodies. There was slight play in the linkage so I improved this with some plastic washers so there's now zero play. When doing this I also re-balanced the throttle bodies using a Synchrometer that a friend lent me (thanks Alex).
The result of these mods, which cost a couple of quid and no more than an hour or two, is the car feels a million times better. The throttle response is much improved and the engine responds really smoothly at lower revs.
In light of the big difference this simple adjustment has made, I wondered what your best quick win has been? What simple change have you made that's made a big difference?