Your waiting time should never be a wasted time. Use it to deep dive into God's word and really get to know Him better. It is more than head knowledge, but more like the automatic response of your heart towards Him because you are one with Him. It involves trusting, surrendering and understanding.
“Biblical knowledge is far better than gold when it fuels our trust in God. Otherwise, it only fuels our pride.” - Jon Bloom, DesiringGod.
This is the foundation from where your attitude towards waiting can stand upon. The closer you draw near to God, the more He will reveal his character to you, the better you will understand your journey of waiting.
"Draw near to God and He will draw near to you." - James 4:8
What are practical ways that you can develop your intimacy with the Lord?