One of the lessons of Sefiras Ha’Omer is to focus only on today.

“Don’t think about your aveiros of the past [which will make you distressed and lose hope] and don’t think about what will be in the future [which will make you feel that it is impossible to maintain your teshuvah for a long time]. Think about this day alone. Today I can make a nachas ruach for Hashem with Torah and mitzvos.”

~ The Divrei Shmuel zt’l