Puritan Musings: Sovereignty and Success?

I am currently reading through Michael A.G. Haykin's book "To honour God: The Spirituality of Oliver Cromwell" for one of my classes at seminary. Each week throughout the semester, I am supposed to read a portion of this book, which is a collection of Cromwell's writings, and have a small reflection upon something that he says. Therefore, I have decided to share these "Puritan Musings" with you. They won't be very long, but I hope that perhaps someone may get something from them.
  

Today, my musings upon Oliver Cromwell’s writings come from two sources: his letter to the Honourable William Lenthall in June of 1645 (pg. 53), and the other from his letter to Sir Thomas Fairfax on March 7, 1646 (pg. 59). Both letters contain words about someone giving God credit for their achievements. The former is talking about a brave soldier, and how this man gave God all glory and honor for his battlefield heroics, despite the fact that this was a rather brave and skilled man. The latter speaks directly about Cromwell himself, as he admits to giving God the glory for as many things as he can. 

I have long pondered on, say, a professional fighter giving thanks and props to God for the knockout he just scored. Did God really give him that knockout? If I say yes, then it almost seems God is playing favorites in the ring, but to say no denies that He is sovereign and in control of even the most trivial of matches. That is obviously false, and both men in the Cromwell reading knew that. He is a sovereign God; He deserves honor in all good that we do. 

What successes are being given to us by God that we need to give Him credit for? How can we better give Him the glory for what we do, win or loss?