You want to include your basic contact information at the top of each document, ideally with matching letterheads. Use the same letterhead for both your resume and cover letter to show that the documents go together.
What to include:
Your name
Phone Number
Your position/field (optional)
Use size, colour, font, etc to differentiate the letterhead from the rest of the document content. Think of it as a title. Typically, letterheads are centred. Your name should be the largest, but no more than about 24 pt. Consider the space taken up and the formatting of the rest of the document content.
Here are examples of basic layouts which you can adapt:
Name Surname
Medical Office Assistant
name@email.com | 604*******
Name Surname
name@email.com
604*******
Name Surname
Surrey, BC
t: 604******* e: name@email.com