What is the best source to study Classical Mechanics for a Grad Physics student who struggles to solve problems? [duplicate]

I am a physics major student who graduated last summer. During my undergrad years and now in my graduate level studies I always worked experimentally. I worked in labs with professors for years. Of course with a moderate amount of studying and with the help of my succesful research career in experimantal optics, I graduated and accepted to the graduate school. I applied for research assistantship and took the exam. Unfortunately I realised that my knowledge and problem solving abilities had become dull over the years. Especially in Classical Mechanics. Could you suggest a book or two for a graduated student who took calculus and a intro. classical mechanics etc. what I mean is I know most of the concepts I don't need to start from the very bottom. I can understand derivations. What I need is a lot of solved examples and exercises with increased difficulty. I know I can't solve a tough problem on my own right now. I just need a guidance. Is there any source that can help me?

Before answering, please see our policy on resource recommendation questions. Please write substantial answers that detail the style, content, and prerequisites of the book, paper or other resource. Explain the nature of the resource so that readers can decide which one is best suited for them rather than relying on the opinions of others. Answers containing only a reference to a book or paper will be removed!