Okay, so from what I remember, I haven't done this in a while.
Apply the paste on the contact surface of the HS/F, give it a big of a stir in this case to clean up the consistency
Move it on to the CPU, make sure the spread is good, try to keep it a thin layer (due to the high pressure retension mechanism)
Then wipe of any huge blobs outside of the contact area.
Double check.
Then you're done?