Gather clean data on outputs
Export leads by source, revenue by client, or trial sign-ups by blog post. Keep one metric per table so you can sort it without confusion. If data quality is shaky, fix tracking first; the rule only helps when inputs and outputs line up.
Sort, rank and draw the cut-off
Order the list from largest to smallest contribution. Mark where cumulative output crosses roughly 80 %. You will spot a short, steep section the “vital few” and a long, flat tail. In a SaaS funnel, five nurture emails might account for almost all conversions; the rest just add noise.
Double down on the vital few
- Raise ad spend on the two LinkedIn campaigns that already convert.
- Give VIP support to the top 10 % of accounts that drive referrals.
- Expand the webinar series that wins the most meetings.
Improving a proven lever by 10 % often beats launching something untested from scratch.
Trim, automate, or park the trivial many
Archive under-performing ads, sunset unused features, or batch low-value admin once a week. Reclaiming those hours funds deeper work on the 20 % that counts.
Repeat the analysis every quarter
Markets shift; yesterday’s star article can fade. Schedule a recurring 80/20 review each quarter, ideally right before OKR planning, so next cycle’s goals reflect what is now driving results.
Conclusion
The Pareto Principle turns “work smarter” from a slogan into a method: identify the few inputs that power most outcomes, invest more there, prune the rest, and repeat. In growth marketing, the habit of quarterly 80/20 reviews keeps focus on the campaigns, clients and experiments that truly move pipeline and revenue.