Rainy days are ideal times for reflection and correction. During these times you can reflect on where you are at within the scope of your progression towards your ideal. Breaking down your progress allows you to pinpoint areas that hinder your progress, and then fix them.
From this vantage point, you can then re-examine your ideal of which you are aiming at, and from there reorient yourself towards your ideal with greater precision.
The Bible touches on this idea in Psalms 46, “Be still, and know that I am God.” Although this piece of scripture is interpreted as one quieting themselves before God and coming to know Him personally, it can also be interpreted as a time of reflection and reorientation of your ideal aim. Practice quieting yourself and reflecting on what needs to be done in order to accomplish what you have set out to do.