also use "do" when talking about work. for example "i have lots of work to do tonight", or "i will do my homework tomorrow". we use "make" when talking about building or creating something. for example, i will make a cup of coffee, i will make the brownies or i will make food. we also use with a few standard expressions that you will memorize with time. these include: make a decision, make an effort, make the bed, make friends, make money, and so on. 