Psychogeography: How could you explore a space differently using a phone? Play with different features close up, far away, following a colour or try holding the phone upside down to take a picture!
Video can also be fun to play with try speeding it up or slowing it down. Watch it back, how does it differ when interacting with the subject in real life?
Think about how you could record your work, photo, video, drawing, sound recording, telling a friend or family member about it or an app which follows your route, look at the line that it made.