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I'm something of a knife geek myself, too. You'll rarely catch me leaving the house without a blade somewhere on my person - not carrying one doesn't feel right somehow. Much like the OP, I tend to EDC a Spyderco UKPK. This is my one:

When I'm out in the wilds, I go for a Frosts Mora in a rather lovely little leather sheath (probably cost more than the knife!):

This little bad boy rides in a pouch on my Chrome bag - no way it's likely to get me into any trouble because it's not really a knife. It's a Benchmade ERT-1 emergency rescue tool and incorporates a seatbelt/ligature cutter, an LED light and an automatic glass punch:

And as someone mentioned bowsan'arrahs, here's how I carry my compound bow when I'm going off to archery club:

It's funny how much more room you get from overtaking cars when you've got that on your back and a quiver full of carbon arrows sticking out of your pannier...
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When I'm not carrying a Zefal HPX frame pump (the daddy of all frame pumps - will get a tub up to 160psi, no problem) I carry one of these:

It's good because it's got a T handle that folds out so your hand doesn't ache. I'm no body-builder, but I once pumped my partner's tyre up with it and when we got home, she went to top it up it on the track pump and saw it was already at 120psi.
Recommended.
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Scherrit and Corrine are friends of mine and we're clubmates in Twickenham CC.
Apart from being the biggest bike geeks in London, offering the best fitting and spannering service around (who else do you know that rebuilds Campag ergo levers?) if you want to get fitter and faster on your bike, Scherrit also offers a very reasonably priced coaching package.