Once you are financially free, the worries about money disappear, but to get there you need to take a few steps and learn a few things.
You have to keep track of all your expenses, where does the money go? Make budgets for different types of expenses, so that one budget does not eat away from another budget. Keep it tight, and be rigid about the several limits you have set for yourself. This attitude will help you from day one and into the future.
Even if you have reached financial freedom at some point, don't let go of this attitude. Keep track, and never overspend or else you might lose the freedom faster than you achieved it.