Any one can make themselves a "wine cave". It doesn’t have to be in a deep dungeon where the dust lay thick and the water is dropping from the cave ceiling. A normal closet can work just fine. However, you need to take some aspects into consideration.

Everybody should keep a cave book in order to keep track of purchases.

Make tasting notes ! ! It is easy to forget what you tasted last year. This way you can also go back and compare over how the bottle has matured.

Always store the wine laying down in order to keep the cork from drying out.

The wine needs to be stored in a stable temperature. 10°C (50°F) is preferred but 15-20°C is acceptable. Temperatures above this might damage the wine. That is to say, it will age faster.

Keep the wine away from light. Especially white and sparkling wines are affected by this.