Asalamu Alaikum Tahara,

Great question. May Allah reward you and help you achieve your goal in a way that pleases Him. Salah (prayer) is the number one most important task that would determine our position on the Day of Judgment.

So here are a few tips:

1- Seek the help of Allah Himself. Remember that in each and every single prayer we actually tell Allah in Surat Al Fatiha {It is You alone we worship, and You alone we ask for help} (Qur’an 1: 5). So, focus on that and ask Allah sincerely for His help and He will surely help you. That is the number one thing to do. But there is more that you can do. 

2- Remember this hadith before every prayer, and that prayer is essential to your success on the Day of Judgment. The Messenger of Allah (PBUH) said:

The first of man’s deeds for which he will be called to account on the Day of Resurrection will be Salah (prayer). If it is found to be perfect, he will be safe and successful; but if it is incomplete, he will be unfortunate and a loser. If any shortcoming is found in the obligatory Salah, the Glorious and Exalted Rubb [Lord] will command to see whether His slave has offered any voluntary Salah so that the obligatory Salah may be made up by it. Then the rest of his actions will be treated in the same manner. (At- Tirmidhi).

3- With this in mind, pray sunnah prayers so that they make up for the shortcomings in the obligatory prayers.

4- Do istighfar (repentance) after each obligatory prayer to show sincerity to Allah and acknowledgment that our prayers don’t match His Greatness and what He deserves.

5- Try to know more about Allah Himself and His Names and Attributes so that when you’re standing between His Hands in prayer, you know who you’re speaking to.

6- Try to read/watch tafseer (exegesis) of the Qur’an because that’s very powerful. The more you know the meaning of what you’re reciting, the more you’ll be able to concentrate. 

7- You can say the dua between takbir and recitation of Qur’an that is at the link here: Sahih Al Bukhari.

8- In all cases, try to concentrate as much as possible, and whenever Shaitan (Satan) or your nafs (the self) distract you by dunya (worldly affairs), then simply get back to concentration and struggle against those whispers. They don’t necessarily have to beat you or take your concentration completely away. 

As long as you’re sincerely trying and taking steps, then you’re on the right path and Allah will accept your efforts from you. He is The Appreciative (As-Shakoor), who appreciates all efforts His slaves do for His Sake.

Additional Resources:

http://productivemuslim.com/your-jannah-todo-list/

https://aboutislam.net/multimedia/videos/concentration-salah-hard/

https://www.youtube.com/watch?v=l1lxQ-9K6eU

https://www.youtube.com/watch?v=8p34kdsJOCE

https://www.youtube.com/watch?v=8p34kdsJOCE  

I hope this helps. Walaikum Asalam.