Where to start, Financial fitness day one

I make around 75k-125k a year.  I travel around the country remodeling hotels.  It s a great gig.  Last April we had a few jobs fall through so i had to sit for 6 months, and that is when the money dried up in my pocket.  I had to do odd jobs to pay some of my bills and live.  Rewind.  How is this possible I make a lot of money, I am single and have very little overhead.  I hands down wasted the last two years of income.  I ate and drank a hearty portion.  I traveled and traveled some more on the rest.  I had to take a job as a laborer, living in a buddies house just to make ends meet.  I am very good at my job, I just had to wait for the next project.  I am finally back to work, now this time i will be prepared if I have an unplanned furlough without pay. 

Here is my life by the numbers:

Debt: 17,384.11 (truck) 

Credit score: 455, 4 derogatory accounts totaling $2413

Savings:  $1560 index funds, ready to liquidate anytime

I read Set For Life, Scott Trench is a genius.

I have started paying myself first, 10%.  Living on less, for me is as follows.  I quit chewing   (gross) saves me money($50 per week), and my life.  Lunches out, gone.  Saves me countless amount of time and money.  I plan on living off of $5 dollars a day, with a $50 buffer per 2 weeks.  I am a grown kid, so lunches are peanut butter and jelly sandwiches at a cost of less than .50 daily.  

Bad debt:  Oh this truck is financed at 21%, I plan on paying 3k a month on the truck and it will be paid in full in August.  I am also going to snowball the lowest derogatory account this month.  The remainder of my bi-weekly check will be rolled into my savings.

I only have 2 bills besides the truck, insurance($147) and a phone bill($140).

My next check will break down as such, after tax $3,000

Myself $300

Living: $120

Insurance: $140

Truck $1500

left over: $940

Networth as of today: NEGATIVE $858.00

Emotional state:  Not happy with myself today.  On paper Jack is a clown.  Now lets fix this, see you in 2 weeks.