Most CRMs fail not because of missing features, but because they model someone else’s workflow. Here is how I model the real one first.

A CRM is only as good as the day-to-day workflow it captures. The generic ones lose because they force a sales team to bend around a model that was designed for someone else.
Before writing a single migration, I sit with the people who will live in the tool and watch them work. The pipeline stages they describe out loud are almost never the ones the off-the-shelf product assumes.
Modeling that real pipeline first means the database mirrors how the business actually thinks — and adoption stops being a fight.
The fastest win in any CRM is removing manual follow-up. A small rules engine — “if a deal sits 5 days in negotiation, nudge the owner” — saves hours a week and earns trust immediately.
Software people enjoy using is software they keep using. Adoption is a design problem, not a training problem.