My two new(ish) favorite online tools:
Amazon’s Universal Wishlist — lets you add listings from any store to your Amazon wishlist. It’s just a bookmarklet you can add to your browser, and it does a pretty good job at grabbing the price and product picture from the page (and you can manually adjust if necessary). I’ve always loved the Amazon wishlists, but now that you can save things from any web store, they’re even better.
TripIt — forward your confirmation emails for flights, hotels, etc. and it builds an agenda for you. It includes all your trip details like times and dates and confirmation numbers, plus maps, weather, links to check in to your flights, check flight status, seating charts for the planes… Best of all, it has a great iPhone-optimized mobile site. This is super handy, because now I don’t have to look through my email to find my confirmation numbers and things like that, and with all the travel I’ve been doing lately, I’ve found it really useful.