To convert prospects and opportunities into clients you need to have nurturing activities for those that aren't ready to join right now - which will be the majority. Where can you be helpful and how can you always have something to invite the prospect to?
case studies
awards
educational content: video, podcast, whitepaper, blog
educational webinars and Q&As
entertainment events (once COVID restrictions pass)
send your book
offer a free 'growth planning session'
build your email list and keep it warm through regular invites, education, updates