When you are in church, it's always good to carry a pen and notepad to jot down the scripture text, reference scriptures, and sermon notes. When you come prepared with notepad and pen, you are able to feed off the scriptures from the sermon throughout the week, while asking God to open up your understanding for a deeper illumination of the word.
When you get a hankering to talk or complain about what you gave up for Lent, replace that hankering by speaking the word of God. For all the times you would have done the activity that you gave up for Lent, replace it by reading the word of God. Christians should always be drawing closer to God.