Finding a good balance is important because good logo design is inspired by a good life experience. Walk the path with purpose and have fun.
Make everything clear up front before you start anything – deliverables as well as budget. Gather, research, ask questions, glean, observe so you leave no room for speculation.
Don’t assume your client knows what you mean. Go out of your way to explain the finite. Avoid industry terms, speak like your client. Don’t assume you know everything. Ask them questions, get to know their sub-culture. See the ball, be the ball.
Be prompt on your replies, honest in your answers and promises, true to your convictions and precise in your creative execution. Don’t be a “Tooler.”
Enjoy what you do. If you exude passion, your clients will catch your vision and get excited too. If it doesn’t move you don’t expect it to move them.
Be relentless in these matters and success will follow. Let normal life inspire your creative life.