Some people think that when you create a model in Sketchup, it needs to be a big complex monster model in order for it to be anything of value. But a lot of times I find I can use Sketchup to solve little problems very quickly and effectively.
For example, I recently installed new flooring in my house, and I needed to calculate the square footage of the rooms I needed flooring in. In a typical room this is fairly easy. You measure the width and length of the room, and multiply them together to get the area.
But in my case, I needed to calculate the area of my living room that is open to my kitchen so I had a lot of funny corners and cabinets to measure around. Then the task of figuring out the area meant trying to split up the dimensions into logical squares so I could easily calculate the square footage; It was starting to look like a homework assignment from back in high school. Instead, I turned to Sketchup to draw my floor plan.