Trust is the product: lessons on long-term client relationships
A signature is the start of a client relationship, not the end of a sale. A few principles I try to live by after the paperwork is done.

In advisory work, the moment a client signs is easy to treat as the finish line. I think of it as the starting line. Insurance in particular is a promise about the future, and clients only find out how good that promise is when they need it.
Be reachable
The simplest way to build trust is to answer. Return calls. Reply to emails, even if the reply is "I'm on it, you'll hear from me by Thursday". People rarely remember how quickly you closed. They always remember whether you were there when they had a question.
Explain the downside as clearly as the upside
Every option has a trade-off. A high deductible lowers the premium but raises the risk. A cheaper model can limit your choice of first contact. When I explain the downside up front, clients are not surprised later, and a client who is never surprised is a client who comes back.
Clients forgive a higher price far more easily than they forgive a surprise.
Check in when nothing is wrong
Life changes: a move, a new job, a new child, retirement. A short check-in once a year, before the autumn deadlines, often uncovers something worth adjusting. It also means the next conversation is a familiar one, not a cold call.
Recommend what you would choose yourself
My personal test is simple. If this were my family, would I recommend the same thing? If the answer is no, the recommendation is wrong, regardless of what it means for my numbers.
Referrals are the scoreboard
The best measure of a client relationship isn't the first contract. It is whether that client is comfortable giving your number to their sister, their colleague or their neighbour. That only happens when people trust you, and trust is built in small, consistent actions over years.