Depends on the ride and on the weather:

Casual weekend ride: Running shorts, running shoes, technical top, helmet, sunglasses, gloves, (if I can remember them), garmin on the wrist; if its cold I put running tights under my shorts and a technical running jacket and wear full finger gloves
less that 50 miler: Padded shorts (I have 3 pairs from way back then), running shorts on top, running shoes, cheapo jersey with pockets (long or short sleve; depending on the weather and maybe a techical underarmor-type of thing underneath if cold), helmet, gloves, sunglasses, garmin on the wrist
more than 50 miles (same as above, but I stoke my saddlebags with consubmables)
racing: Trisuit, helmet, gloves, running shoes