I've used spread sheets in the past. I'm SOLD on Tripit.com and the app. Last year we booked two months in Spain and Portugal. The first part of the trip was getting from Barcelona to St Jean Pied de Port in France, and then a different hotel each night for 200ish miles of the walk to Santiago, as well as rental cars and hired cars for skipping parts of the 500ish miles. After our walk, we spent time in Portugal, then the White Hills Towns, Sevilla, Madrid, San Sebastian, Zaragosa, and Barcelona again. We had our lodging, activities, transportation, flights and the flights of our three adult children and their beloveds to track. ALL of that info went into Tripit, which I shared via the app with all eight of us. I also included PDFs of confirmations. When we got home, I could easily compare credit card charges with the itinerary. We've used Tripit ever since, even for short weekend trips.
It's simple to use... you forward your email confirmations to your Tripit account and the app loads it all. You can export the schedule to your calendar, but the app's visual layout makes it easy to see, open, and change of needed. You don't need to be a tech head to use it...
You can use the free version easily. The pay version tracks credit cards, travel points, checks airline schedules, upgrade possibilities for your seats and more... it even gives you a guess of personal safety for the locations you book.
The ONLY downside I found is that, I had to split the info for our two month trip into two trips because I had so much data (PDFs of our confirmation) uploaded. I didn't need to upload it, but when I travel I'm a suspenders and belt guy... I just want to have everything if I need anything. To do that for our two month trip required splitting the trip...
For me Tripit is the killer app for travelers.