How to master your routing knowledge?

Please let me know wasy to master routing skills. Currently, I am doing my BSCI and I nreally need some advice on how to polisg my skills in routing (OSPF, BGP, EIGRP, ISIS, etc). I would like any suggestion, any website URLs/any ebooks or books? currently, I am using the Cisco press. probably, u guys out there would have more knowledge or experience and I need your guidance. Thank you in advance.