I was just thinking about senses in dreams and listing which ones were most prominent for me (#1: vision, #2: "feel", #3: sound) and I thought about how I don't normally experience taste unless I'm eating or drinking something. I also realized I've never smelled anything in a dream! This shocked me. So, this suggestion:

Basic - Smell an object which has smell in waking life (candle, soap, flower, food, etc.)

Then a few nights ago my husband inspired me to this one:

Advanced/Bonus - Enlarge a DC or shrink yourself and fly into the pupil of the DC's eye. OR, you can go to a mirror and fly into your OWN eye!