Creating a new roll in iPhoto
A good way of classifying you pictures in iPhoto without much effort is by using film rolls. This gives you a more understandable library where you don't have 2500 pictures in a big chunk. It kind of separates the events without the need of creating an album for each one. You can enable film rolls by choosing "Film Rolls" in the "View" menu. When you import pictures from your camera, the rolls will be created automatically. This works amazingly well until you import the content of your camera memory card and you realize you didn't have time to import before and you are now stuck with two events in a single roll. I used to do it in a really complicated manner. I imported any picture from my camera and it would create a roll. I deleted the picture and transferred one of the event to the new roll. That was until I found the simplest way imaginable of doing it: you select the pictures you want in the roll with two events and you choose "Create a Film Roll" from the "File" menu. Boom, you now have your two events in separate and organized rolls.