When you are clear about the skills and qualities that you want to recruit and you have planned the process, you are ready to advertise. Write a compelling trustee advert that will attract good candidates. Explain why your charity matters, the attributes that you want new trustees to bring, and how these will help the board. Don't forget practical details like how to apply.
Share your advert widely, and use channels that can help you reach the right audience for your role. Trustee recruitment sites can help you find people interested in trustee positions. Use your own networks too, and other peoples', to share your advert more widely and to target your promotion.