Your question shows you care about your religion. However, you need to take active steps to practice it; for simply believing in your heart without acting accordingly does not do any good. The Prophet (peace be upon him) said, "Faith is like a seed planted in the heart and manifested through actions."

So if you do believe in Islam, it is important for you to practice it. And you should know that there is nothing in Islam more crucial than praying at the appointed time. Here are some points to reflect upon in order for you to convince yourself of the importance of salah:

1. Salah is the key to salvation. The Prophet (peace be upon him) also said, 'salah is the key to paradise."
2. Salah is the sure way of connecting ourselves with Allah, our Creator, source of life and power. Through prayer, we are empowering ourselves; it as though we are recharging our spiritual batteries.
3. Allah reminds us in numerous places in the Qur'an that those who neglect to establish the remembrance of Allah will be deprived of peace and tranquility, for the only way for our heart to rest in peace is by remembering Allah. And we cannot establish the remembrance except through salah.
4. Salah is the most important pillar of Islam; it was the foremost among the duties enjoined by Allah on every single prophet or messenger; it was also the first of the religious duties prescribed on Prophet Muhammad (peace be upon him) and his followers.
5. The Prophet (peace be upon him) said about the five daily prayers: 'Whoever performs them diligently, they will serve as light for him in his or her life, and as a means of salvation and evidence of faith. If, on the other hand, anyone neglects it, he or she will be raised up in the company of the cursed ones-the like of Pharaoh, Qaroon, Nimrod, etc.- and condemned to hellfire.
6. Last but not least, we are told that the first thing we will be questioned about on the Day of Judgment is about salah: If we did them correctly, we will be saved.  Furthermore, we  are also told that on the Day of Judgment, the pagans in hellfire will be asked, 'why do you find yourselves in hellfire?' they would reply, "we were not among those who used to pray, nor did we feed the poor; rather we simply were indulging with those who indulge."  

Therefore, you need to motivate yourself by thinking of the benefits of salah as well as the harm you will be bringing upon yourself.

I urge you to repent and ask forgiveness of Allah and start praying immediately before it is too late. You must never put it off as we cannot know when death comes.

I pray to Allah to inspire you to be diligent in performance of the salah and thus gain salvation.

You may also consult my answer on fighting laziness under the following link.

• Is there an Islamic remedy for procrastination and laziness?