When it comes to using MetroCard MTA inserts, it's crucial to insert the card the right way — as indicated clearly with 'This side facing you.' Many users underestimate the importance of correct insertion, which can cause the card to malfunction. From personal experience, keeping track of your remaining MetroCards and negotiating unused ones can be quite beneficial. For example, if you have extra cards, you might consider trading or selling them to people who need them, especially if public transit demand is high. Additionally, ensure that the cards are in good condition; worn or damaged MetroCards often fail to work even if inserted properly. I found that using a protective sleeve or keeping cards in a wallet separated from coins or keys prevents them from getting demagnetized. If you're new to using MetroCards, remember that the MTA offers options for refilling your card online or purchasing new ones at vending machines. Understanding these options ahead of time can save you the hassle during your commute. Overall, being mindful of MetroCard handling and keeping track of your cards not only avoids inconveniences but may also open opportunities for negotiation or trade with others. Always follow the instructions printed on the card for the best results.