I make simple "lists" for my daughter to follow when we go grocery shopping. I just cut out pictures and glue them to construction paper and she can help me find what is on her list, while I can look for what is on mine. She loves it, it keeps her focused, and I love the excitement she gets from the recognition! (and being mommy's helper, of course!)
You can easily adapt this for an older child even including a checklist...the possibilities are endless!