If you are sitting by the computer at work and a strong urge comes to you, just get up and walk out of the room. Take a walk and pray. Whenever you feel weak, just stop what you are doing and pray.
Say: "Hashem, please save me from this menuval! He is too strong for me! Only you can help me. Otherwise I am lost. I want to love YOU Hashem, not flesh and blood."
Say it with all your heart. This is what Hashem wants to hear. He lets the yetzer Hara come to us every day, just so that we should cry out to him. And he listens.
Never say "I've prayed for this 1000 times before already". Every time is unique. All the Teffilos gather together, one by one, until they finally break through the heavens when you least expect it, when you feel the farthest, when you feel it is hopeless, when you feel you just can't win.
Remember, every time the Yetzer Hara strikes is a valuable opportunity for Teffilah. And that is what Hashem is waiting for.