Read This Before You Regret

Recite this dua immediately after wudu, sins committed between two wudus are forgiven

Hazrat usman bin affaan raziyallahu anhu says I heard nabi kareem sallallahu alaihi wasallam saying, "Whoever intends to do wudu, then washes both his hands, then rinses his mouth three times, puts water in his nose three times and washes his face three times, and washes both his arms including elbows three times and wipes his head, then washes both his feet, then without speaking recites 'Ashhadu alla ilaha illallahu wahdahu la shareeka lahu wa ashhadu anna muhammadan abduhu wa rasuluhu', then from that wudu until the next wudu his sins are forgiven

," Musnad abu ya'ala, 1/157  

Sleep in the state of wudu at night, sins will be forgiven

Hazrat ibne abbas raziyallahu anhu narrates that rasulullah sallallahu alaihi wasallam said, "Keep your bodies pure, allah ta'ala will keep you pure. Because whoever spends the night in the state of wudu, an angel spends the night with him inside his inner clothing. Whenever during the night the servant turns, the angel says, 'O allah! Forgive this servant of Yours because he spent the night in the state of wudu,'" 

Kanzul amaal, 9/277  

Whoever's ameen coincides with the ameen of the angels, all his past sins are forgiven

Hazrat abu huraira raziyallahu anhu narrates that rasulullah sallallahu alaihi wasallam said, "When one of you says ameen at the end of surah fatiha, at the same time the angels say ameen in the sky. If that person's ameen coincides with the ameen of the angels, then all his past sins are forgiven,"

 Bukhari, 1/108  

Whoever's praise coincides with the praise of the angels, all his past sins are forgiven

Hazrat abu huraira raziyallahu anhu narrates that rasulullah sallallahu alaihi wasallam said, "When the imam says 'Sami allahu liman hamidah' while rising from ruku, you say 'Allahumma rabbana lakal hamd'. Whoever's saying coincides with the saying of the angels, all his past sins are forgiven,"

 Muslim, 1/176  

Make a habit of praying 2 rakats of chasht, sins will be forgiven 

Hazrat abu huraira raziyallahu anhu narrates that rasulullah sallallahu alaihi wasallam said, "Whoever makes a habit of praying two rakats of chasht, his sins are forgiven even if they are equal to the foam of the sea,"

 Ibne maaja, 98