If we can get good at not resisting what is... just let things be as they are... we will suffer SO much less! And it really does take a LOT of practice. We have to practice with little difficulties so that when the really big challenges of life arise, we will have some tools with which to work.
We, especially those of us in western cultures, spend a great deal of time and energy resisting. We resist when we get what we don't want and when we don't get what we do want. We resist, mentally, so many things over which we have no control. We develop the mental habit of resistance, and then we just keep strengthening that habit if we aren't aware.
So, my tip for the day is to try to notice when you are mentally resisting anything in your day. Just make a note of it and see how much you resist things. Only by first being aware of our patterns of resistance can we start to practice not resisting. Accepting what is can lead to great joy and inner peace.