Chris says it's important to tag your photos and have a system because it makes it much easier to search for what you want. Here's how you can organize your photos:
1. Make an album. Chris does this for every event. It's really easy to organize that way. Leo says that most programs will let you sort by date as well. Then you can drag them into a new album.
2. Use keywords in the meta data. Use the auto tagging features. Most apps offer a CMD+I to get information on the image and then you can add them.