Quiet the monkey mind down. Ask the supremely wise unconscious for insight. Keep asking until an answer comes, either in dreams, meditation or while you're washing dishes. But if you don't ask you don't get. Now here's the hard one.
Any trivial info comes, look at it, then absolutely forget it.
Say you're reading a book. Letting thoughts loll around making themselves at home in your brain is like inviting tramps into your living room. Tend to them at the front door, then say 'goodbye' nicely. Do not let a single low-grade thought lodge in your brain. Thoughts are tricky.