Flashback to 1975, riding nothing but rural roads, I used a mechanical odo and the little metal thingie that "pINGd" every time it smacked the little cog wheel. I used the rythem of the "pING" as a pacer. Oh and a watch and pocket notebook for a log - to track distance and average speed... *sigh*.
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FB4K - Every October we wrench on donated bikes. Every December, a few thousand kids get bikes for Christmas. For many, it is their first bike, ever. Every bike, new and used, was donated, built, cleaned and repaired. Check us out on FaceBook: FB4K.
Disclaimer: 99% of what I know about cycling I learned on BF. That would make, ummm, 1% experience. And a lot of posts.