Here is a short kavanah (meditation) we can have in mind before performing any mitzwah:
First, picture yourself surrounded by other Jews. Then recognize that all Jews are considered Tzaddikim and are full of mitzwoth. Remember that you once sinned, or one of your actions or thoughts was not entirely for the sake of heaven. See how all of the Jews, in fact the entire Jewish people are towering all around you, shining brightly. Realize how insignificant you are in the face of the entire history of your people, your grandparents, great grandparents, your children, their children.
Once you have reached that level where you are utterly lost within the sea that is the Jewish People, then connect that place, that image, that idea, back to HaShem.
See how the sea that was Bnei Yisrael in your mind is smaller than the smallest fleck upon the vast infinity that is HaShem.
In short, when you prepare to do a mitzwah, lose yourself in the united House of Yisrael, and then lose Bnei Yisrael in the enormity of HaShem.
Then you are ready to perform the mitzwah.