Assess the club, group or sport you plan to support and create a list of why it requires a booster club. Write a list of the necessities or desires the group is looking for -- ranging from simple fundraising opportunities, a special field trip or equipment to use on the field.
Create a plan for the booster club pertaining to the cause you support, outlining how you will raise funds (fundraisers, donations or sponsorships), as well as what the money will be used for and how. The more detailed the outline of your plan is, the more likely the school administration will consider the club.
Gather support from those participating in the group or club you are creating a booster club for by having each individual sign a petition to create a booster club to help persuade the school administrator.
Schedule a meeting with the school's principal or administration and bring your documents and presentation for the booster club along.
Plan to begin using your booster club immediately after you receive permission to have it by hosting a car wash, a bake sale or another fundraiser to start adding funds to your club.
Keep track of all money raised and earned for the booster club while keeping the club's funds separate from your own and report financial statistics each semester according to the school's rules.