I will list a few self-help books I recommend. Some of them are very old so the technology of their times are certainly different than now but they are over 99% fundamental type books that they are useful today and I feel will be useful a 100 years from now. When reading please be aware of the changes in technology and think how the fundamendals can be applied with today's technology. I am sure you will see they are compatible.
I recommend that you read most of the books at least once and get the general ideas of each of them and maybe write it down for future references. Most of them are not long and you can read a chapter a day in probably about 15 minutes if time is a constraint. I think you may get so interested in them you may spend more. I recommend at least one reading of each of the books except the first two listed. You can get these books probably from your local bookstore or interlibrary loan if not available at your local library. Please list your books and they don't have to be self help books or include the ones I listed. I recommend that you at list read the first three from my list.

Think and Grow Rich by Napolean Hill published in 1937. A great book that puts emphasis on making money but it can be used to help you get other goals such as becoming a good chess player, etc. Mr. Hill recommends 3 readings of the book. I recommend 6. Also I would have titled Chapter 11 Enthusiasm. His main point is to have a Positive Mental Attitude with positive determined action.

How to Win Friends and Influence People by Dale Carnegie. A great book. I recommend 2 readings. Remember sincerity in Mr. Carnegie's ideas are a must or it will do you no good to read it.

The Richest Man in Babylon by George S. Classon. A great book with great ideas. One time to me would be enough if you get the main ideas. In fact I recommend one time on the rest of the books unless you want to read more.

How I Raised Myself from Failure to Success in Selling by Frank Bettger. A great book on selling. Mr. Bettger was a good pro baseball player until he was injured and then became a successful salesman. His son Lyle was a great movie star. I recommend that you read at least one book on selling if not this one even if you don't become a salesman or salesperson.

I will recommend others later.