All the efforts in the world will not make any changes worth while.

Fix upon the habits of dress, etc., that good sense tells you are reasonable and in accord with your age, your position and your purse, and then follow them regardless of the fashion or the prevailing style.

You know as well as I that, unless you are a near-millionaire, you cannot possibly keep up with the many and various changes demanded by current fashion.

Then why worry yourself by trying?
Why spend your small income upon the unattainable, or upon that which, even if you could attain it, you would find unsatisfying and incomplete?
In your case, worry is certainly the result of mental inoccupancy.
This is sometimes called "empty headedness," and while the term seems somewhat harsh and rough, it is pretty near the truth.

If you spent one-tenth the amount of energy seeking to put something _into_ your head that you spend worrying as to what you shall put _on_ your head, and how to fix it up, your life would soon be far more different than you can now conceive.
Carelessness and laziness are both great causes of worry.