Hello Ramesh,
The most important thing is "Interest".& "Knowledge".If you have interest functional Module like Material Management ,Production,Sales Distribution etc then SAP Provides Different modules for all these. you can get knowledge of these modules by local institutes.
If you like development as you know ABAP, then apart from abap you can go for webdynpro,Workflow and OO-ABAP.
Even you can search Different SAP modules which will idea that which model is suitable for me to grow in career. and also which modules is more demanded in your current company. so that you will get correct idea.
I hope this is useful information for you.
Regards,
Ameya Karadkhedkar
