The past no longer is. The future has not yet come. So look deeply at life as it is.
Learn to watch and wait. Emotions come and go like waves on the shore, so if you can be mindful of them you will understand where they come from and also that they are impermanent, like everything.
If you disagree with someone, make a conscious effort to step into their shoes and see the situation from their point of view. Even if you continue to disagree, you will gain some understanding.
There are some people whose turbulent waves of behaviors will drown you no matter how well you think you can swim.
Be thankful for closed doors, detours, and roadblocks. They protect you from paths and places not meant for you.