How do you buy the right handbag?

Well I think a woman has to have a few handbags, for it depends on where she is going that determines what she has to take with her, I have bags of all different colours and sizes. if I am going out for dinner I just need a small bag for keys, money,mobile phone, but if I to some other plces I need a bigger bag that I can take a camera which I like to take nearly everywhere, but then there is times like going to places where there is a lot of waiting around then I need to take even a bigger bag where I can also take my music with me, so that is camera, MD player plus extra discs...oh it is hard being a woman... :)