Absolutely not doing my Disney life in $25 increments, I'd lose my mind! I transfer and combine them as stated by others above, I get most of my cards from places like target and
best buy when deals are out. I have a spreadsheet to track all my gift cards.
All our spreadsheets differ a bit, I do: purchase date, vendor, order #, card number, ean, purchased value, date transferred, transfer location. Another tab has my "permanent" cards (ones I will kill after I use in person) with the same data but also a current total value, last date I checked the value on the website and a note section for things like "3/23 $200 hotel deposit" so I don't ever overload a card (spend $200 and then load $1k, then need that $200 refunded- the system will choke and Disney has to get involved and issue new gift cards since you can never have more than $1k on a gc).