SFH 6mo lease conversion to monthly

[Miranda Crown]

Do you have any general guidelines you follow when converting from a fixed lease to a monthly? We are renting out a SFH with a 6mo lease starting 11/1/13 so that it will end about the time we can decide if it's worth putting back on the market for sale. During that time, we would consider a monthly lease and if the house doesn't sell, likely offer a yearly lease at a better time of the year. How do you set up your lease to automatically convert to monthly once the 6mo period is up? Thanks, in advance!