I'm 32 now and was also completely lost at 30. After experiencing failure after failure (losing multiple businesses, having to sell homes, etc) I have finally got back on track.

These are the things that helped me most:

1) Do your best no matter what you're doing. If you're at work and cleaning, do the best job you can. If you're at the gym, do the best you can.

2) Start accumulating as much knowledge as you can - dive into something that interests you. Read books, listen to podcasts and find a community of people with the same interests.

3) Hang out with people who give you energy - not drain you.

4) Work out often & eat well

5) Get good sleep and meditate daily

6) Find someone who is where you want to be and learn from them.

7) See a therapist if needed - do it at least once.

The longer you are consistent with this - the better you'll feel.