Sallat-ul-tasbeeh.

Bismillahir Ramanir Raheem

‘This is a special prayer the Prophet (s.’a.s.) taught Ibn ‘Abbaas, that if he offers it, as will be explained, Allah will forgive ten kinds of his sins: The first of it and the last of it, the old of it and the new of it, one done unintentionally and one done intentionally, the small of it and the big of it, one done in secret and one done in manifest.’ (This introduction was taken from the USC-MSA Compendium of Muslim Texts website.)


Pray four Rakat, in each read al-fatihah, and
another surat…after you finish reciting (in the first rakat) say, while you
are standing:

SUBHANALLAH, AL-HAMDULILAH, LAILAHAHILLAALLAH, ALLAHU AKBAR.

Say it:
15x after reciting surah fatiha and the 2nd surah.
10x during ruku after saying prescribed glorifications=25
10x in Qu’ma (after the ruku) = 35
10x in the 1st sujdah after prescribed glorifications =45
10x in q’adah (between the sujood) = 55
10x in 2nd sujdah after prescribed glorifications = 65
10x in sitting position after sajdah before getting up for the second rakah=75

that is 75 in each rakaat, do it in all four rakaat.

If you can pray this prayer every day then do it, but if you cannot then
do it once a week, if you cannot than once every month, then if you cannot
then once a year, if you cannot then once in a lifetime.

Source:- http://nur313.wordpress.com/2006/08/03/salatul-tasbeeh