The most expensive marketing mistake isn't financial.

When people talk about expensive marketing mistakes, they usually think about wasted advertising spend, a failed campaign or choosing the wrong agency. I don't. The most expensive marketing mistake I've seen rarely appears on a spreadsheet, it's losing focus.

Every year, marketing becomes more accessible. New platforms emerge, AI promises to save time, and there's no shortage of advice telling businesses what they should be doing next. On the surface, that's a great thing, however, the problem is that every opportunity competes for the same resource.

Your attention.

Every new marketing activity asks for your time, your energy and your focus. None of them seem particularly demanding on their own, but together they begin to pull your business in different directions. Over time, marketing becomes a collection of disconnected activities rather than a strategy. You're busy, but you're no longer building momentum.

One of the biggest misconceptions in marketing is that growth comes from doing more. From everything I've seen over the years, the opposite is often true. The businesses that grow most consistently aren't trying to be everywhere. They aren't chasing every platform, trend or new idea. They've made a conscious decision about what matters to their business, and they're disciplined enough to protect it.

That discipline is often overlooked. Saying yes to a new marketing opportunity feels productive and the right thing to do. Saying no rarely does. Yet every time you say yes to something, you're choosing not to invest that same time, energy and attention somewhere else. That's the real cost. Not the money you've spent, but the momentum you've diluted.

I've worked with organisations that had substantial marketing budgets and specialist teams, and with founder-led businesses where marketing sat alongside every other responsibility. Despite the differences, the businesses that made the greatest progress shared one characteristic. They weren't better at marketing. They were better at deciding what deserved their attention. I think that's an important distinction, because attention shapes priorities. Priorities shape decisions, and decisions shape growth.

Before asking, "what else should we be doing?" Perhaps the better question is, "what are we prepared to stop doing?"

That's often where clarity begins. Marketing will always present another opportunity and the challenge isn't deciding what to add next. It's having the confidence to protect your focus.