What is something useful I should learn from now that would be useful for the rest of my career in SAP?

Hi experts , Its been almost 6 months i been into SAP World(Mobility- now deals with Mobile application development(SUP, SAP ui5,fiori, NW, and concepts of BAPI, ) and its really interesting to learn.

I also figured out that SAP is an Ocean and we cannot be an expert in every module of it. So, what are the few Areas that are advised to learn from today that would be useful for the rest of my career in SAP(career in SAP for Long run, both technical and functional )?