The answer to this question is, "one bite at a time". That's the approach I encourage students to use when approaching math problems. Often in reading an apparently difficult problem, looking at each part in its singular concepts, they are able to work through the problem to a successful end. They start at a place where they are comfortable and usually find the problem becomes progressively solvable. This encourages them to integrate skills they have used for years in the context of the current problem thereby expanding their knowledge base...'til the next time!