After looking around a bit for tutorials for SketchUp I remembered that there was an online teaching program called "Lynda" and I learned some new features from going to Lynda!
When I made houses in SketchUp I didn't do it right, I new that I didn't do it right, I just didn't know how to do it correctly. I had searched online in the past to see how it was really done. I knew that I had to make a blueprint first then go off of that, I didn't really know how to make a blueprint before and so didn't build the 3D models correctly. I found out how to make a blueprint using different layers to construct the walls, floors, doors, windows, and so on. From going through the lessons I know know how to properly construct a building in SketchUp.
To get in more detail on why and how I didn't do it correctly, I had made the 3D model like you would make a sculpture out of ice. You start with a big block of ice and chip away until you create something. What I did was had a block and pulled things out of it. Now I know that I have to first create a blueprint of the building I want to make, then pull the walls up and add the detail and it would work out much better.
I found that in addition to starting with a blueprint its best to have a separate layer for almost everything, like one for interior walls, one for exterior walls, one for floors, and so on and so forth. If you have a bunch of layers for each thing you can get more detailed with your 3D model, like if you wanted to make all the floors yellow all you have to do it click one button and bam! they are all yellow. Whereas if you had done it by hand it would take you 5 times as long or more.
Here is a quick photo of a blueprint I just started:
