One of the smartest entrepreneurs I know, Amelia Friedman (co-founder of Hatch Apps, which allows you to build native apps without coding) gave me the simplest tip. If someones goes above and beyond in helping you develop your business, send flowers.
She personally claims to be putting Urban Stems in business.
I love this. It's simple, not that expensive, and pays dividends down the line.
Everyone loves feeling appreciated. So go ahead, make someone's day.