How many factors do you have to take into account when taking you blood pressure?

For example, movement, breathing, after a meal etc?
How many factors do you have to take into account when taking you blood pressure?
[1] correct cuff


[2] movement


[3] breathing


[4] diet


[5] current stress level


[6] current physical level


[7] yep, after a meal


[8]





probably about 10, that's what I can think of at present