Being a new consultant I would like to improve my problem-solving and structuring skills which are key in analytical work. Can any of the experienced consultants please give some advice or refer me to maybe some good books/links that may help me with this. Many thanks, really appreciate your help.

Hmm...revisit the cases that you have done to prepare for your interviews?Some free cases are at caseinterviews.com

Peter Sellers, please stop plugging your website at every possible opportunity. It's very annoying.