What makes you feel nostalgic?
For me there isn’t just one thing that makes me feel nostalgic. However, the most powerful is probably music. So many songs are tied to people, events, places, etc that it is easy for a song to transport you back to a specific memory. Sometimes the nostalgia of music is great such as hearing BSB and feeling like a teenager; sometimes the nostalgia is sad like hearing Daniel and thinking of my grandpa. I often associate music with whoever introduced me to an artist, song, etc so that can also evoke a lot of nostalgia. I could go on and on about the power of music on reminiscing about the past!
Other things that are nostalgic? Smells can be! Cucumber melon always takes me back. Some items and photos evoke a sense of nostalgia. Driving by a place you used to frequent can also do it. Jewelry, clothes, old letters…I suppose the true answer is anything can be nostalgic!