Freelance consultant seeks manageable ways to build credible online reputation

[EthanPT]

I'm a freelance consultant, and a potential client recently told me they couldn't find any substantial online presence for me beyond a bare-bones LinkedIn profile, which made them hesitant to proceed. I've always relied on word-of-mouth, but I realize I need to build a more professional online reputation. For other independent professionals, what are the most effective and manageable steps you've taken to establish credibility and visibility online without it becoming a full-time job?