List your goals, experiences, activities and accomplishments in a Horse Project Record book. Turn your record book in each year to review the previous year's work. Complete the three record book levels in one to several years. Learn about horses and related subjects at a level appropriate for your age and experience.
Check with your County 4-H Agent about specific requirements for your county. Blank and typable forms can be found here:
https://nc4h.ces.ncsu.edu/youth-3/4-h-awards-incentives-programs-2/