Reading through my entries, I realized that you might want to see some more screenshots to illustrate my points and make things easier to understand. I will go through the posts over the weekend and upload some screenshots.
Remember that using the presented steps will help you becoming more effective with your import into Aperture for the long run, especially when you have to work with a lot of keywords. The initial setup can be time consuming, especially organizing the keywords.
I went through my keywords yesterday and started reorganizing them by exporting them into a text editor. This seems to work faster than working in Aperture directly. When you have a keyword more than once in your keyword list, make sure to select the correct keyword for the filter in the Smart Folder. Aperture appears to be stubborn, when it comes to that.
Some users prefer using Stacks in Aperture to organize and sort their images, others use the star rating system to stay organized. You need to see what works best for your circumstances and photo shoots. It is a theme, I will cover stacking and organizing images in Aperture soon.