I started asking the nurse (at whichever doctor's office I was currently at) about my readings each time she took my blood pressure and pulse. (In my opinion, they should automatically tell you what the readings are, but that's just me.)
After doing this at every doctor's over a period of a few months, it became clear what normal blood pressure and pulse readings are for me. Now, if I go to the doctor, and the pulse or blood pressure is quite a bit off from my normal readings, I ask them to take it again and/or we discuss why the readings may be different than normal.
This is a very unscientific method of deciding what an average blood pressure and pulse reading is for you as an individual. Obviously, if you're consistently way off from the 120/80 blood pressure and 70-80 pulse that's considered the norm, it's worth discussing with your doctor. Also, if you go to the doctor, and your readings are very different than normal, that's another hint that you should have a conversation with the doctor.
I think you might feel most comfortable knowing your individual average since not everyone's readings fit the "norm". Even if they don't fit the norm, it doesn't necessarily mean you're unhealthy- it just means your should double check with your doctor that your average readings are okay for you.
Also, if you get nervous at the doctor's (I do), remember that your readings may be a little higher than they would be at home or somewhere where you're comfortable.
Hope this helps!