I finished by printing the consolidated list to take on my trip, and I found myself consulting it several times at the airports and during my stay in Boulder. Perhaps if I had an iPhone to access the Internet on the go, I could do away with printouts completely.

I encountered a couple of glitches, many of which have since been fixed since TripIt opened to the public in September — a sign its San Francisco-based operators are working to improve the service.

But the system still assumes "a.m." unless I specify "p.m." or use a 24-hour format, and I couldn't enter a time range — such as for a daylong event I could drop by anytime.

These quibbles are minor, and TripIt can't be blamed for the shuttle driver getting lost in Boulder, or for me missing a spectacular view because I was too busy sending text messages.

Back in New York, I had three days before my next trip, and in just an hour or two, I was able to get my entire itinerary organized. TripIt automatically recognized my car-rental reservation made through Orbitz and flight from Continental Airlines — the seat number was missing this time, however.

I manually added trains to the airport, along with addresses and directions for various wedding events in the Napa Valley north of San Francisco. I forwarded my hotel confirmation, but because it wasn't one TripIt recognized, I had to manually move it to the itinerary.

It wouldn't be fair to blame TripIt for the congestion that delayed the plane an hour before takeoff, nor for forgetting to pack a swimsuit for Calistoga's hot springs.

That got me thinking, though: Information on the flight's on-time performance would be nice. I also could have used a packing checklist and perhaps tips on complying with ever-changing security rules.

I was getting the hang of TripIt by the third trip, to Hartford, Conn., for another marathon, and thus had time to come up with suggestions for improvement:

• After moving unrecognized confirmations to my itinerary, I had to hit "edit" to file it under the right date and time. It shouldn't be a two-step process. Just let me fill in that information when I move it.

• A feature called TripClipper lets you create TripIt notes while visiting another Web site simply by hitting a button. But the note only carries the Web address — not what's on the Web site — making it useless on a printout. And notes are limited to plain text and image attachments — I couldn't keep a Web site's layout and formatting.

But those are not reasons to avoid TripIt.

The service has since added support for trains and restaurant reservations along with ways to retrieve crucial details — like departure time — on wireless devices with e-mail. I only wish it offered a text messaging option — I promise to be more mindful of the scenery.