How about all booking a little cottage somewhere for the weekend - maybe even a chalet somewhere daft like Butlins.Lots of drinky poos,nibbles,out for meals in the evenings,all having a pampering session in the afternoon - hair,make-up,and more drinky poos!
Book yourself and your closest friends into a really good health spa for a few days! You will look and feel great afterwards! Just think, you will have been 39 when you went in and will come out feeling totally refreshed, looking even younger and stunning and feeling like a Goddess!! What more can a woman want? Well, maybe if you have a boy friend, you could celebrate your new youth with him when you all get back (LOL) :o). Get him to take you out for a sumptuous meal somewhere romantic - just the two of you though!