Assuming you would like tips on how to build something quickly:
When time is of the essence, building something fast is often necessary. There are a few things you can do to make the process go more smoothly.
First, have all of your materials gathered and organized before you start. This will save you valuable time running around looking for things as you work.
Next, come up with a plan or blueprint of what you want to build. This doesn't have to be anything fancy - a simple sketch will do. Having a plan will help you visualize the project and figure out the steps needed to complete it.
Finally, work efficiently and methodically. Don't rush, but don't dawdle either. If you can stay focused, you'll be surprised at how quickly the project comes together.