Spaces is pretty cool. This might help you get started:
To call Spaces up (view all active spaces and be able to select one to bring to focus), you can:
1. Press F8 (or whatever your hotkey is set to)
2. Click the icon in the Dock (assuming you have Spaces in the Dock)
3. Move the mouse to a corner of the screen; choose which corner in System Preferences
To move around Spaces, you can:
1. Call Spaces up using the aforementioned methods and click on the space of your choice
2. Use Apple + Arrow (up, down, left right); you might have to choose this hotkey for yourself in System Preferences
3. Click the Spaces icon in the Menu Bar at the top and choose the space (if it's not in your Menu Bar, you can put it there by checking off a check box in System Preferences)
4. Drag a window to the edge of a space and hold it there for a second or two
Also note that you can make certain applications always open up in a certain workspace. You can "default" it to Space 1, 2, 3, etc, so that whenever you open it, it will go to that Space (and it will change the current Space for you automatically).
One of my favorite things to do is this:
I have Expose set up so that bottom-left corner shows the desktop, bottom-right organizes all windows, and upper-right shows me all spaces. If I have a cluster of open windows on my desktop, I organize all the windows by moving the mouse to the bottom-right, show Spaces by going upper-right, then move one of the windows to the clean new Space.
It just feels so pro