Sincerity Checklist

http://www.onislam.net/english/reading-islam/living-islam/growing-in-faith/452831-sincerity-the-foundation-of-perfect-deeds.html

(1) No gratitude: How did you feel?

(2) Efforts were not recognized, appreciated etc. How did that feel?

(3) do you remember the deed constantly so that it feeds the ego/arrogance?

More importantly: 

Love

If you already acknoledge that Allah swt is the creator, and all His attributes..than you should KNOW who's opinion really truly matters!
Go back and re-acknowledge Allah SWT's Attributes!!!

Fear

The Messenger of Allah (saws) said: ‘The first of people against whom Judgment will be pronounced on the Day of Resurrection will be a man who died a martyr.  He will be brought and Allah will make known to him His favours and he will recognize them.  [The Almighty] will say: “And what did you do about them?”  He will say: “I fought for you until I died a martyr.”  Allah Subhanah will say: “You have lied! - you did but fight that it might be said [of you]: He is courageous.  And so it was said.”  Then he will be ordered to be dragged along on his face until he is cast into Hell-fire.  [Another] will be a man who has studied [religious] knowledge and has taught it and who used to recite the Quran.  He will be brought and Allah will make known to his Him favours and he will recognize them.  [The Almighty] will say: “And what did you do about them?”  He will say: “I studied [religious] knowledge and I taught it and I recited the Quran for Your sake.” Allah Subhanah will say: “You have lied! - you did but study [religious] knowledge that it might be said [of you]: He is learned.  And you recited the Quran that it might be said [of you]: He is a reciter.  And so it was said.”  Then he will be ordered to be dragged along on his face until he is cast into Hell-fire. [Another] will be a man whom Allah had made rich and to whom He had given all kinds of wealth.  He will be brought and Allah will make known to him His favours and he will recognize them.  [The Almighty] will say: “And what did you do about them?”  He will say: “I left no path [untrodden] in which You liked money to be spent without spending in it for Your sake.”  Allah Subhanah will say: “You have lied! - you did but do so that it might be said [of you]: He is open-handed.  And so it was said.”  Then he will be ordered to be dragged along on his face until he is cast into Hell-fire.