Using that experience, I wrote a short devotional and sold it to Christian Herald. Keep an idea file. A spiral notebook or a recipe card file will work well. When an idea strikes, write it down. Jot down bumper stickers and funny incidents that happen with the kids.
Reading can inspire ideas for fillers, too.
Pick up some sample issues of your favorite magazines or examine the ones you receive at church or by subscription. Seasonal ideas make great fillers. Use the four seasons or the holidays to write recipes, poems, puzzles, or short prose. One way to come up with ideas for holiday fillers is word association. Make a list of words associated with the holiday.