Jai Sai Raam,
To the best of my knowledge as it is written in last chaptor "51" of the book "Sai Sacharitra" Saptaham means you have to start Sai Sacharitra book of Sai Baba on a THURSDAY after offering Bath to Sai Baba Statue with MILK HONEY CURD and WATER, you shall finish the book in next 7 Days all 50 chaptors and on the next Thursday when you are preparing for your last chaptor you shall make some Sweet or you can even use Sugar as sweet for Baba. This way in a week time starting from Thursday till next Thursday you have to finish the book. Also if possible and recomended you shall not use the bed but sleep on Floor with thin Bed of sheet or something. This way it will help you get rid of all your problems and get your wishes blessed from Baba ji.
Anyone else having other information please correct me if I am wrong.
Thanks
Rakesh