What is something simple you can do to improve your life?

For me it would be having a responsible schedule for certain things.

There is only one thing I can do to improve my life. It is also self-improvement and continuous learning.

Eating properly will improve your life immensely

More organization and self care

Start walking to places within a few miles from your home, try meditating as soon as you wake up for like 5-10 mins and lastly stop wanking.

Starr doing minor stuff with your non-dominant hand, such as brushing your teeth.

Commitment to such stuff will subconsciously discipline your brain and be more likely to follow a new schedule you have set for yourself. Basically,the discipline carries over.

I don't take things seriously, idk if i can change that. but i have to

Just drinking more water will benefit your health

having a proper sleep schedule can change alot

As kuromi32 said, having a proper sleep schedule. Simple as hell, but hard to do.