When was the last time we shed tears in our salah, in our Qur’an recitation, or in our du’a to Allah? Ponder the following causes of an ill heart:
“There is no harder punishment
than when the servant has a cruel heart and moves away from Allah.
If the heart was cruel, the eye will never shed tears.
Cruelty of the heart is caused by increasing four things over and above one’s needs: excessive food, sleep, talk, and socializing.
When the body is sick, food and drink is no use to it.
Likewise when the heart is ill because of desires, advice is useless.
Whoever wants to purify his heart,
must prefer Allah over and above his own desires.” 
Make sincere repentance in these last few hours of Ramadhan. I am reminded of an advice by Sheikh Omar Suleiman, may Allah preserve him, that we should try as much as possible to force a tear out in each of the last 10 nights or Ramadhan – even if we gotta fake it. Make our faces as if we’re crying until we actually start to cry.
Find that surah or ayah that really gets to us
ponder about its meanings
ponder about Jannah and Jahannam
about the sirat that all of us have to walk across
whether we will be among those who will receive our Book of Deed on the right hand
or whether we are among the ones who are doomed, who’ll receive on their left
ponder on the ayah when Allah s.w.t. Himself will say to those who are doomed: “Remain you in it with ignominy! And speak you not to Me!”
and ponder, in our current heedless state, whether we will truly be the ones when Allah s.w.t. says: “Some faces that Day shall be Nadirah (shining and radiant). Looking at their Rabb.”
Force just ONE tear out and then make du’a from the bottom of your heart, in hope and fear of Allah. For that one tear might be our one accepted deed that will save us on the Day of Judgment.
 Ibn Al-Qayyim (rahimahullah) | Al-Fawwaid, P-176