Alhamdulillah wa salatu wa salam ala rasulullah (SAW) amma ba'd... Assalamualikum
These are not exactly challenges but rather some tasks or activities sort of. It will help you reflect and change for the better. In Sha Allah.
#1 : Reflect
Reflect on what you have done today and how you could have done it different. Implement those tomorrow. Pause and think until the countdown goes to 0. You may realize there are certain things that were completely under your control and you could have done it different only if you wanted to. They may mean something insignificant to you, for example, rather than listening a song, spend some time with your family or read an Ayah from the Quran but these small steps could really change your life.
#2 : Alhamdulillah
Have you ever thought how blessed you/we (Ummah) are? We are so blessed that we could spend our enitre life listing His Blessings but yet we wont be able to as Allah (SWT) says in the Quran:
"And He gave you from all you asked of Him. And if you should count the favor of Allah , you could not enumerate them. Indeed, mankind is [generally] most unjust and ungrateful." [14"34]
Every time we say Alhamdulillah, that's a Blessing too because our ability to speak is certainly an immense Blessing of Allah (SWT) upon us.
It is, for sure, we can never really thank Allah (SWT) for His Favours but that does not mean we dont try to. Atleast we can acknowledge His Blessings and never ever forget that it belongs to them. When He wants, He will grant them. And when He wants, He will take it away.
We should not be too proud of what we have rather be humble towards Allah and be grateful as He chose us to shower His Blessings upon.
So, list atleast 10 Blessings of Allah that He has given you. You will realize while listing them, that its an endless list. Many things will pop into your head.
In Sha Allah this will help you to thank Him more and more and as a result get closer to HIm.