Look for patterns in things, mathematical, visual, geometric, logical, emotional, symbolic; start building bridges between all of them.
A good book that has a Ne vibe is Godel, Escher, Bach.
[ame="http://www.amazon.com/Godel-Escher-Bach-Eternal-Golden/dp/0465026567/ref=sr_1_1?ie=UTF8&s=books&qid=1274499680&sr=8-1"]Amazon.com: Godel, Escher, Bach: An Eternal Golden Braid (9780465026562): Douglas R. Hofstadter: Books[/ame]
Also Metamagical Themas
[ame="http://www.amazon.com/Metamagical-Themas-Questing-Essence-Pattern/dp/0465045669/ref=sr_1_1?ie=UTF8&s=books&qid=1274499708&sr=1-1"]Amazon.com: Metamagical Themas: Questing For The Essence Of Mind And Pattern (9780465045662): Douglas Hofstadter: Books[/ame]
Escher in general will get your Ne surging.
Learning about fractals, researching biological evolution, emergent complexity, etc, etc. These are all things that have my Ne bell chiming.