Give the paragraph a job
A paragraph should help the reader follow one main point. For a recommendation, a useful opening states a benefit. Each following sentence should develop that benefit rather than start an unrelated topic.
Move from a claim to support
Try this scaffold: point, reason, example, explanation. Explain why the example supports your point. This is a drafting aid, not a required sentence count. A short message may need less support than an essay.
Use honest examples
An observation from your experience can make an idea concrete. Label imagined situations as possibilities. Avoid making up statistics or claiming that a personal example proves something is true for everyone.
See it in practice
Starting point
The waiting area needs benches. Benches are good. There are buses outside. It would be better.
Using this skill
Adding benches would make the waiting area more comfortable. People sometimes wait through several bus arrivals before their route appears. A parent carrying a child, for example, could sit while watching for the bus. A few seats would make that wait easier.
Every sentence develops the benefit of seating. The example helps explain the benefit instead of simply repeating that benches are good.