Proverbs 2:6 states this: The Lord gives wisdom. From His mouth come knowledge and understanding. That just about covers it all really. He will give us wisdom. James chapter one says that He gives wisdom to those who ask of Him. That part is actually pretty simple. What makes it difficult is waiting on His answers. We tend to ask for wisdom and then try to walk on in our own strength. Wisdom is not impatient and sometimes it dictates that we do not make decisions too hastily. We can ask - and He will give us the wisdom to walk through difficult days and make difficult decisions.
The other part of this verse says that from His mouth come two things: knowledge and understanding. What comes from our mouth? Our words. So from His word - spoken or written we can gain understanding as well as knowledge.
These three - wisdom, knowledge and understanding, are not withheld from us because of adverse circumstances. His promises are all still just as true for us today as they have ever been. Today - remember to ask Him for direction for the big things; then remember to ask Him for wisdom in the small things too. Stay in His word to find knowledge and understanding.