The background music I have found is a must I most the time am not thinking about that. because I am busy thinking about shooting. and any time I forget to turn on some music. they always ask if we can have some music on. and I say sure and ask them what they like and I turn it on.

Great point Eddie see how I even forgot to add that in my tips let alone remember it during a shoot :-) it is a big help for the model and sometimes you get lucky and there fav song comes on and they start to dance. lol you can get some cool shots of that unless they blur like mine have lol