When I was younger I was dealing with some demons. I lost my job, my car, ended it with my fiancee, and really was in a bad place. I was fortunate enough that a family member offered to get me setup in another state with a job that paid room and board.
I sold virtually everything I had and moved to the other side of the country. I took most of the next year just focusing on taking care of my issues and planning for the following year. As things worked out, the room and board gig ended abruptly and with nowhere left to go, I moved back to the town I had left earlier that year. I really didn't want to and was pretty afraid that I was going to end up just going back to the way things were before. But I decided I would do everything different.
One thing that helped was listening to music that I liked back before all of the shitty stuff happened, which was early high school. That helped get me in the right frame of mind, and probably more importantly, started me back to a place where I actually liked myself.
First thing I did when I moved back was buy a bike. Next thing was finding a job, which I found two, a full time and a part time. I then signed up for community college, which started in a couple months.
I quit smoking, studied harder than ever before, shooting for all 4.0 in my I worked as many hours as my jobs would give me.
I also used my relationship with my ex-fiancee to give myself standards for any girl I would date or have sex with in the future. I called it "the three I's". She would have to have intelligence, independence, and integrity.
After my first year in college I had a near 4.0, I had enough money for a car, and I had met the girl who I would eventually marry.
That was about 20 years ago now. I went to University after community college, then law school. I have a good family, home, and job.
It took refocusing, setting standards for my actions, and working towards my goals. But really it was just small decisions everyday that accumulated into greater achievements.
Just figure out what you need to take care of now, where you want to be afterward, then just do a little bit each day to get there. Don't be afraid to excel or fail, because the next day is just a few more small decisions that will lead to greater achievements.