The best way to learn Financial Modeling is through practice, because it gives you experience in building a professional financial model
You must be organized and make sure that your assumptions are clear. This can be done by using different colors in writing, for example, write the assumptions in blue and the outputs in black
It is necessary to build the model in a clear, simple and easy-to-follow manner for users. This means that you should build the whole model in a single sheet and then gather everything along
together in order to be able to create different sections. It will also make it easy to expand, collapse or move around the model