What a good plan to save money?

First you must have a goal to what you are investing so much money in. Without a goal, there is no motivation. For example, you want a nice house that you've seen in Beverly Hills that is a few million, you want to save up to buy that house and life a luxurious life after. There that's your motivation, now just restrain yourself from buying stuff that are not necessities.

for a house so you can live with your family