I use Mint to track everything. Since you can split one charge into multiple categories, I categorize the amount of GC/VR loaded as "Transfer" since it will be transferred to BB, and I categorize the price of load for GCs as "Travel" since that's what the MS eventually gets me. I have my BB accounts and all my CCs listed on Mint so it's really easy to go back and forth between them to make sure every purchase and load is accounted for.