Narrated Abu Huraira:
Some poor people came to the Prophet and said, “The wealthy people will get higher grades and will have permanent enjoyment and they pray like us and fast as we do. They have more money by which they perform the Hajj, and ‘Umra; fight and struggle in Allah’s Cause and give in charity.” The Prophet said, “Shall I not tell you a thing upon which if you acted you would catch up with those who have surpassed you? Nobody would overtake you and you would be better than the people amongst whom you live except those who would do the same. Say “Sub-han-al-lah”, “Alhamdu-lillah” and “Allahu Akbar” thirty three times each after every (compulsory) prayer.” We differed and some of us said that we should say, “Subhan-al-lah” thirty three times and “Alhamdu lillah” thirty three times and “Allahu Akbar” thirty four times. I went to the Prophet who said, “Say, “Subhan-al-lah” and “Alhamdu lillah” and “Allahu Akbar” all together for thirty three times.”
Sunnah: say takbir 33 or 34 times, tahmeed 33 times, and tasbeeh 33 times after every compulsory Salah.
It’s something you can do in about a minute, and gain reward equal to those who perform Hajj and Umrah, fight in Allah’s Cause, and give in charity. Won’t you do it then? :)