Sell the skyline.... fuck its hard but buy a 1-2k 3cyl charade or something and dump the rest on the CC. Cheaper on fuel/rego/maint/insurance.
I went from an 06 WRX to a 2000 AU wagon, and it was the smartest thing i ever did, no pics lost her job and was pregnant and i would have been close to going bankrupt if i kept the lease.
Through various (legal) ways i managed to get rid of 75k worth of personal debt in 4-5 years and now have my own home (mortgaged).
Don't go buy LCD's with your tax cheque put them on the CC's. Our biggest thing was to work out exactly where all the money was going, take all your bills you get in a year, add them up and divide them by 26, and put that away each fortnight without fail. that way you never worry about the bills.
figure out an amount you need for food per fortnight and stick to it, buy no name brands.
Give yourself an allowance for fuel, going out and general expenses.
all the rest put into the cards and loans, when your allowances are gone, stiff shit you sit at home and watch TV.