Sadly you can't force anyone to model for you, otherwise you will end up with problem number 2 ;)
If and when you do get someone in front of your camera, it's always good to get them in the position/pose you ideally want them in, and just talk to them and make then laugh. You'll get a lot of funny mid-talk photos, but you'll capture a lot of natural smiles and expressions. Another good trick is, if they can't stop force smiling, ask them to close their eyes for a while, then ask them to slowly open them. When they open their eyes, they SHOULD have their relaxed and natural facial expression!
no subject
If and when you do get someone in front of your camera, it's always good to get them in the position/pose you ideally want them in, and just talk to them and make then laugh. You'll get a lot of funny mid-talk photos, but you'll capture a lot of natural smiles and expressions. Another good trick is, if they can't stop force smiling, ask them to close their eyes for a while, then ask them to slowly open them. When they open their eyes, they SHOULD have their relaxed and natural facial expression!
Nadine//Claw