To help solve complex issues, why not learn a new language? Speaking more languages not only allows you to connect with people, but as bilingual brains also look and work differently from monolingual ones, it assists you in terms of problem-solving.
The critical period hypothesis says that children use both hemispheres in language acquisition, giving them a more emotional approach. Adults will often use the left side more in that process, giving them a more rational approach when confronting problems.
However, whether you learn a second language as a child or as an adult, being multilingual is associated with a higher density of grey matter and higher levels of activity in certain areas of the brain. These areas include some playing a relevant role in executive functions, in filtering tasks and in finding solutions – all critical for innovative thinking. This TED talk shows you more.