The dress you linked to would be 60s style. Wear with white trousers with a bit of a flare. Hair could be backcombed at the crown, with a thick alice band. Wear heavy eye make up and pale lips.
I'd be tempted to go for the 70s look myself - a bit more flattering. I'd be looking for a cheesecloth type dress - tightish on bodice with flared skirt. Wear with a floppy hat with a scarf around it and wedge shoes (ideally with a cork or straw effect heel).
Well............ I went into town today and bought a maxi-dress. I'm not overly keen on wearing a dress and am hoping that I can find someone to shorten it to a tunic style top so I can wear it with my white trousers.
I'm going to have my hair cut into a shorter bob and maybe cut my fringe back in then use some of the material from the dress alterations to use as an hair band.