Should i wait until the last minute to book my august vacation?

I am looking at prices for holidays in augst, but they seem a bit steep! is it worth me booking 2 weeks off during the 6 weeks holiday then fishing around for some incredible bargains? or should i book now and be done with it. i am not too fussed where i go, i am open to any place - so thats not an issue. i dont know! does someone have experience in booking last minute holidays? any advice would be greatly greatly appreciated.
Answer
The earlier you book the cheaper it normaly is if you book it now then you know its done and you dont have to worry bout as it over and done with with my experience by booking a last minute holiday cost me a alot more then it would of been if i had booked it earlier