Determine what sort of creative writing course you want to plan. It could be a course on how to write poetry or the best way to write a book. Think about whether you are going to include lessons on improving technical accuracy and grammar, or if you are just going to stick with the "creative."
Identify your topics. Start with the introduction to the course. Plan lessons on setting, character, plot, structure, metaphor and symbolism.
Draft your creative writing course outline. Fill in the blanks, such as the time, dates and length of the course. Decide if there will be a student assessment at the end of the course, or if it is just for fun.
Leave the course outline draft for a day or two and then review it. Check to see that it follows a logical sequence. For example, you might want to teach students how to write short stories before you get into novel writing.
Compile a list of recommended readings. You will want to provide students with good examples of creative writing to give them a goal to strive toward.
Figure out how you are going to evaluate your creative writing course. Use an assessment model that tests the result against the objectives of your original creative course outline.