It’s occurred to me that I increasingly pick suppliers and tradespeople based on their reliability and communication, rather than their skill.
I try to reflect this when providing services myself—not that I don’t have skill.
Things I try to stick to:
Always try to reply within 24 hours, even if it's just to say 'I'll get back to you later in the week.'
Sometimes you need to juggle multiple projects, and that's fine, but always try to let clients know when you'll be working on their project, even if it's in a couple of weeks—so they don't think you've abandoned them.