If you're rockin Phils, the amount of tools needed are so minimal, you hardly notice them.(except for the folded spare tube bulging through your pocket)
I usually have a long 6mm allen key, 2 plastic tire levers, and a carbon fiber pump which is so light and small.(140 psi)

The bulging spare tube through the pocket is kind of a pain sometime so I have to bust out the big messenger backpack to carry everything in :)

Which bike pump do you use?

http://www.nashbar.com/nashbar_photos/medium/BB-CB1.gif
Nashbar

i also have everything in my bag, which is almost always on me if i'm on the bike.

2 co2 cartridges and an inflator, a mini pump, 15mm ratchet wrench, allen wrenches, a few tubes, tire irons, mini chain tool and whatever other junk.

I just bought this one, less than 6 inches long, 93 grams, will let u know how it works.

I figure if the pump is too big i wont want to carry it.

http://cgi.ebay.com/ws/eBayISAPI.dll...e=STRK:MEWN:IT

I carry my flat kit in my backpack... and I've never had a flat (except when the LBS installed my tire!) with Specialized Armadillo tires.

I got my first flat in almost a year with my new Allez this past Friday, the LBS put Armadillos on for me and I got a pinch flat... to boot... they put the tires on backwards.

are backwards tires prone to pinch flats?
Ive never heard that.

I carry: pump, patchkit and someties an extra tube in my bag.

It amazes me how many people whom ride daily/weekly hobble to a bike shop to change flats. NYC shops close by 6/7 and once you leave the city shops are not as plentiful. But no matter where you are in the city, the subway is but a short walk away.

During all my years riding in NYC, I kept a spare tube strapped to the underside of the saddle with a toe clip strap and it never got jacked. I wouldn't leave valuable tools on the rig, but the tube itself seemed to have no appeal to the criminal element. As for patching vs. replacing, I join the rev: replacing is quicker, and you can save the busted tube for a subsequent patch job. Anyway, sometimes it's too hard to find the puncture on the street - if it's dark out, you can't see it, and if it's noisy you can't hear it, and if it's windy, you can't feel it.

Sometimes, if you're having trouble, you can pump the tube up and run it past your nose and smell where the leaky puncture is located. Seriously.

you can also use your upper lip to pinpoint the leak, that's a very sensitive part of your face, and you'll be able to feel the air coming out of the tube. sounds weird but it works.

ha! and i thought i was the only person using this method...

That's my method too, but when it's real windy, my stiff upper lip won't cut it.

If worse came to worse, I would try to stop in someplace with a bathroom, put the tube underwater (sink, not toilet) and look for the air, that's what I generally do at home for the really small punctures.

Generally if worse comes to worst I can just catch the train home. Or if it's late, I'll walk.

But it's a good point. You should think about the worst case scenario, say you have a all-out blowout that leaves your tube in shreds. Where does that leave you? If the answer is walking 10 miles home, pack a tube. If the answer is walking 15 miles home, pack two.