Honestly, I am still yet to find out if I got a full-time offer. However many seniors have offered me advice and I will regurgitate. Ask good questions and be genuinely excited to learn. Also- make good decisions at NIT!
I'd say try to learn as much as you can and as fast as possible -- senior associates are very useful with complex issues you don't get straight answers from associates because they've learned virtually everything that you'll be doing. Ask questions to have a thorough understanding of the work not just what you do but also the work of partners and managers etc... Know how it all comes together. You're able to ask tuff questions this way. Show growth and improvement. Ask for lots of feedback.