There are many ways for a business person to continue improving. I have had lots of good advice from authors Brian Tracy, Zig Ziglar, Jim Collins, and more.
One immediate way to improve your business skills is through reading. By reading one-half hour per day in your field, you will begin distinguishing yourself in your company and career. It may not seem like a lot but accumulatively the knowledge gained will be substantial.
Another place for learning is in your vehicle. Every day you can add to your knowledge by listening to audio programs that will help you in your field. As Zig says, "make your automobile a university on wheels."
Of course goal setting is another huge step in self improvement. Write out your goals and the means to get to them. Revisit these goals often.
There is a roadmap to success and it is continuous self improvement.