You can separate Shoots with Keywords or use a Folder structure, Job Name + Date or whatever you like to name the folders that Shoots images are stored in and use ONE Catalog that contain ALL your images.
He's absolutely right, you can distinguish the different shoots via metadata or folders. There are a large number of advantages to one catalog compared to multiple catalogs, and a lot of disadvantages to multiple catalogs compared to a single catalog.
Hi guys thank you for the responses. I don't like having one catalog for all images. I understand the collections and breakdowns but I feel much more comfortable for my needs such as draging the folder (shoot) I am working on on to my local drive and then placing it back. I appreciate the feedback guys. I got it going.