Good luck!!! Lol, the million dollar question - if you get answers I'd be interested to know - I'm a year in now, still dont have a fixed title, the main focus changed about 4 months in, my research questions are being reformulated (AGAIN) atm, so I wouldn't worry too much ;-) As you get going you find that it takes on a life of its own - of course you must control it - but the research I'm doing now bears little resemblance to what I had planned a year ago ;-) Different geographical areas, different angle, different results so far, different everything apart from the main underlying sources and the overall question. I'm sure I should be more organised but as I started to read and started to work new themes came to light, it grew and became (I hope) much much better and more interesting