Dhikr after salam — Subhanallah, Alhamdulillah, Allahu Akbar
سُـبْحانَ الله (ثلاثٌ وثلاثون) الحَمْـدُ لله...
سُـبْحانَ الله (ثلاثٌ وثلاثون) الحَمْـدُ لله (ثلاثٌ وثلاثون) اللهُ أَكْـبَر (ثلاثٌ وثلاثون) لا إلهَ إلاّ اللّهُ وَحْـدَهُ لا شريكَ لهُ، لهُ الملكُ ولهُ الحَمْد، وهُوَ على كُلّ شَيءٍ قَـدير
Subhanal-lah (33 times), Alhamdu lillah (33 times), Allahu akbar (33 times). La ilaha illal-lahu wahdahu la shareeka lah, lahul-mulku walahul-hamd, wahuwa AAala kulli shayin qadeer
Translation
How perfect Allah is (33 times), All praise is for Allah (33 times), Allah is the greatest (33 times). None has the right to be worshipped except Allah, alone, without partner, to Him belongs all sovereignty and praise and He is over all things omnipotent.
When to recite
Recited after each prayer — 33 times each.
Source / Reference
Muslim 1/418