Resume and the cover letter are done, now onto references.
When deciding who to ask to be your reference consider folks who are your professional level or even higher. Focus on people you have worked with and who can honestly give a knowledgeable and obviously favorable review of your performance, achievements and character.
Additionally, make sure to ask people you have worked with if you could list them as your professional references (and keep them professional, no family members) – don’t assume that you can list anyone without asking for their permission first.
On the other hand, when someone asks you to be a reference, do you always say yes and if so why? If that is the case, I would like to ask you to considering saying yes only to those you honestly believe are good at what they do – don’t simply pass an ineffective employee onto someone else (no matter how tempting that may be).