Before you can learn how to improve yourself, you need to examine why...
If you don't "organize yourself" you'll find that you negatively affect yourself and those around you.
You may say "I don't care about that"; but that's not true. You do care... because if you're experiencing pain, you care about that pain - even if it's just in a negative way. claim
It's very rare to find someone in pain who would say "it wouldn't be any different if I was out of this situation"... so you care. evidence
So, if you do care about improvement in your life (removal of pain), or "getting your act together" - how do you go about doing that? conclusion
You may argue that "you don't care", but the nature of pain is that, by definition, you care about it or it wouldn't be a pain.
So, you do care, even if you don't want to admit it.
There's a desire to improve ones situation (one's self). claim
Summary of 'why should you bother improving yourself?' question.
So, you (a.) get get your act together...
... so there (b.) isn't more stupid pain than necessary.
Before you ask yourself "what could I do to improve myself" you first need to consider why you should even bother. Two main reasons: First: while suffering may be unavoidable, suffering more than what's necessary is avoidable... so improving your life helps you avoid "avoidable suffering". Second: Your improvement also affects those around you, improving yourself reduces their suffering as well.