What along with PI??

Hi Experts,

Primarily I am a PI resource(4 yrs exp) , but the organisation I am working in has many things to offer , means I can along with PI can work or learn abap or BI or portal.Also I have enough time left from my PI work , so that I can engage in other technologies.

But I dont know , being a PI resource which tech knowledge along with PI would be best combination.

Any suggestion?