I'd turn this on its head. My customer is my boss. That attitude might upset a few line managers but it would help build bridges between IT departments and the other arms of the business.

As for what makes a better manager?

• Give clear objectives that conform to the SMART paradigm

  Specific

  Measurable

  Achievable

  Realistic

  Time bound

• If you say you are going to do something then do it albeit threat or promise
• Remove obstacles to the SMART objectives
• Remember to say "Thank you"
• Acknowledge work well done especially that beyond the call of duty
• Be very clear when something needs to be improved and how
• Know when to butt in and when to butt out
• In group situations keep the team focussed
• Keep meetings to the minimum and identify the objective of the meeting, actions, responsibilities for those actions and time scales
• Shield the team from external distractions
• Escalate team concerns to the powers that be when necessary
• Learn when to shut up....not when its your round in the pub
• Make sure the interests of the team take precedence