On my last few rides I came up with a new way to greet oncoming cyclist by giving them a "soldier salute" (four fingers straight out thumb bent inwards to the forehead). I've found the response is greater then a flick of the wrist as you pass each other; there is no time to react with the wrist flick. With the salute I hit them from a close distance so there is time to respond. A hi, a good morning, a good afternoon, a what's up, a nod of the head, or my favorite a smile Any one else use this technique, or how do you greet fellow cyclist the are riding towards you?