Ever felt depressed, miserable, unhappy with life and unable to cope with trials? Well, it's all the workings of iblees, a.k.a. shaytaan and his helpers. I know what it is like. I, too, have been grabbed by the ankles by that rotten devil before now, and dragged towards the pit of no-emaan. The key is to know that shaytaan is at the root of the problem, and then deal with him.
Understand that it is a war between you and shaytaan.
DO NOT LET HIM WIN.
Say the following, with as much calm determination, force, or volume as you need.
"Audhu b'Illahi min ash-shaytaan ir-rajeem"
If an evil impulse from Satan provokes you, seek refuge in Allah. He is All-Hearing, All-Seeing. As for those who fear Allah, when they are bothered by visitors from Satan, they remember and immediately see clearly. (Surat al-A’raf, 200-201)
The Prophet (peace and blessings be upon him) said, “Satan runs through the blood veins of son of Adam, but when he remembers Allah, Satan retreats!”"Bism Illah, leave me alone"
Constantly repeat adhkaar - Subhaan Allah, Al Hamdu l'Illah, Allahu Akbar.Abul-Maleeh (ra) reports that a man said, “I was behind the Messenger (saw) and his riding animal stumbled. I said, “May Shaytaan perish”, and he said, “Do not say, “May Shaytaan perish”. If you say that he will grow in size until he becomes the size of a house and says, “By my strength”. Instead say, “In the Name of Allaah”. When you say that, he reduces in size until he is like a fly.” (Abu Dawood, saheeh isnad).
Negate shaytaan's power by saying, "La hawla wa la quwatta ila b'Illah."
Recite Ayat al Kursi.
Say the adhaan.
Recite the Qur'aan in your house - especially Surat ul Baqarah, which will send him fleeing.
Abu Hurayrah (ra) reports that Allaah’s Messenger (saw) said, “Do not turn your houses into graves. Indeed Shaytaan flees from a house in which Surah al-Baqarah is recited.” (Muslim).Pull out all your ammunition from your du'a book. Direct all your anger, bad feeling, frustration, emotion, and energy into screaming, shouting, and kicking shaytaan out. No, it isn't a typo that I don't capitalize that rotten devil's name - he doesn't deserve the respect of a capital letter.
I know this sounds extreme, but it works. You will have channeled all that negative energy into something positive and good - into tawakkal and ibadah. You will find yourself at the end of that feeling like a huge weight has been lifted from you.
May Allah protect us all from the evil workings and whisperings of shaytaan and grant us the ultimate success of His Pleasure, Mercy, and Jennah - ameen.