I'm a relatively new biker (5 months and 2800 miles) and, other than a couple of organized rides, all my riding is by myself. The upshot of this is I don't get to see how other bikers go about making their bikes work for them so when I have a perceived need, I have to make my own solution. First I added the cheap Schwinn speedometer, no problem. Next I added a heart monitor which I wore on the wrist but I didn't want to be taking my hands off the bars to swap back and forth from heart to time functions so I added the watch, which had the added bonus of a stopwatch to monitor my elapsed time without having to push buttons on the speedo. The watch is wire tied to the bar, sounds sloppy but it works well and doesn't look obvious. Then I had all the functions I wanted but still wasn't happy because the heart readout on my wrist kept twisting around and was hard to see. I wanted to mount it in the front but I was out of bar room. So I found some junk in my shop and made the mount below. Tried it a little while ago and it works fine.
For all I know, there's something really sanitary, tricked out and really cheap to do all this. There's no cheaper solution to my parking brake though. When you prop your bike against something, do you have trouble with the front wheel rotating and rolling allowing the bike to drop? Ii have a fat rubber band around the hand grip, when I stop I just pull the front brake and put the band over the lever end. The bike is then stable.