The first step is to define what creative thinking means, and then to get insight in one's own thinking preferences before trying to tackle this complex subject.
Download Prof. Neethling's e-book: Discovering_W_Brain.pdfKnow your profile!
Use whatever system you like, but do it because it's a little AHA moment all by itself. An NBI profile for example can be done online and takes about 20mins; I can help by offering an affordable profiling service; visit NBI Brain Profiles
Whole-Brain Charts - blended learning - from Herrmann's HBDI.com: