Dhikr (thread):

SubhanAllah wa bihamdihi
(“I praise Allah (or All praise if to Allah) above all attributes that do not suit His Majesty.”)
Reward: 
whoever says this 100 times a day, his/her sins will be forgiven even if they were as much as the foam of the sea [Bukhari].

La Hawla wa la quwwata illa billah
“There is no power or might except (by) Allah.”
Reward:
[the above is] treasure from the treasures of paradise [Bukhari]