Set a definite target, of an amount of money or a period of time that will make the move worthwhile but realistic.
Stick to that target, don't become complacent, or get too comfy back in your mother's care.
Don't spend the money you should be saving on meals out and clothes.
Do take care to give yourself and your parents space by taking weekend breaks.
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Be ready to negotiate when things go wrong or tensions arise - discuss these issues like the adult you are, not the child you were.