Partial suspension hanging is my method of choice, but starvation's also a method that I'm interested in. I've read a lot of conflicting information about it, though.
I believe for a healthy individual it often takes at least two months before death (I'm hardly an expert on the subject, though). In my case, I'm already a bit underweight, so I don't think it would take me quite as long as that.
Imo there are faster and less painful methods. Although I totally believe in the right of the individual to choose a method that has meaning or works for them. My only advice to anyone is to research it and make an informed decision.
Depends on how fat you are. The process is really painful and you will be so hungry that in the end you will eat ANYTHING to survive. So unless you are alone in the desert, forget it. There are better ways.