Where are your users? it's very idea dependant.
Reddit often gets used by my users to make decisions (and it also has strict moderation, so you need to find a balance between being useful and spamming).
For some ideas facebook could be great.
What we are currently doing: 1) Cold outreach to power users - to convert them into affiliates. 2) Cold outreach to individuals who have target ICP communities. 3) SEO for more long term (not for the first 500)
Reddit often gets used by my users to make decisions (and it also has strict moderation, so you need to find a balance between being useful and spamming).
For some ideas facebook could be great.