hope this helps. first make a list of things you really need ie food, toiletries, etc. only take enough cash with you to buy these and nothing else. lock away credit, debit cards or better still cut them up and bin them.
put away money for bills rent, etc. keep out of the pub except for maybe 1 night a month for a treat, but only if you have stuck to your budget. pay bills first as a priority, buy food as cheaply as possible no take aways. stay away from shops except charity shops where you can pick up some nice clothes. and be strong say no no no i dont need it.
I have had to budget and live on little all my life, and now i can keep hubby myself and dog on £80 a week and run a car. main bills are paid out of hubbys pension and we live on mine. we dont owe anyone a penny and manage very well, hope this helps.