Today is the Klausenberger Rebbe ztl's yahrtzeit. The Rebbe ztl said as follows:
In my youth, I was considered a bright and diligent student. How did I accomplish this? I tricked my yetzer hara. Other children had great plans at the beginning of the school year for the whole year, but in the end they failed. I said to myself, "I am going to plan just for today - and set goal for this day only". The Satan, not being interested in a single day, left me alone. The next day, I again just made plans for that day, and so on until the end of the year.
What the Rebbe wrote about tricking the yetzer harah, we can do with our struggles as well. When you wake up in the morning, make a goal to be clean for that day only - no matter what, and the Satan will leave you alone. (And then do the same thing tomorrow as well!)