Good practices on how everything flows through between Balance Sheet and CFS?

Hi guys:

I'm looking for any practice methods / materials on how to become very good at knowing how everything links and flows between balance sheet and cash flow statement - I've gone through breaking into wall street models. Are there any particular types of public companies that I can practice building model off that can help me gain practices on it? I'm thinking about capex / D&A heavy businesses that might help me learn how all those PPE/debt items link together, but would appreciate your thoughts.

Thanks!