Allah does not like those people who don't value there time. Because every soul is born with a count down timer, and we all are going towards death. 

Whoever realizes his time is lucky, this time can take us to heaven or hell fire. 

How to spend your time? 

Because death is in the hands of Allah, and the soul is traveling in the body towards death.  It is just like you see movies in the TV, the same thing the soul goes through in these life dramas, and you are one of the actors in these dramas. And these dramas are recorded by Allah, each and every second. 

During this lifetime, Allah has given us some responsibilities, and teaches us in the Quran and through the Prophet Muhammed. And to learn about the future, and life after death.

While someone is alive, it is like he is writing a test, if you do good or bad, your teacher will never tell you your mistakes, while the test is going on, but when the results come, you learn what is you mark.

But the problem is we can't go back to the past. All the time we are only traveling towards the future. And every person is in a short time in this world. Allah has made a system to keep us happy and not be lonely, he gave us a mother, father, brother, sister, and friends, with a nice family. And all the things, we use in our life for our comfort, he is our provider who has given it to us. But we have to answer to Allah how it was used and how we spend our time. Because he did not create us without any reason. This life is a perpetration for the future, with a limited time. But if this time is wasted, then you will be sorry in the hereafter, and there will be no time in the grave, no doctor, or any other facilities, if we don't practice Islam while we are alive. 

Because we are right now connected with Allah and his mercy, so we can always ask forgiveness, and we can build ourselves as best Muslims. Because after death, if we wasted our life, which cannot be recalled, we will be sorry in our graves. Because if anyone wants to come back and do good deeds in this world again, it will be to late, and not possible.

Don't kid yourself. Because when you are 12 years old, and if your make a mistake in your prayer, then you will be in big trouble, because it will be recorded by the angels, and it is possible that Allah can ask us that when he has given us time, which was your learning time, to pray, understand, and the examples of the Prophet, why did you waste it in this world, with all  the worldly matter left after your death.