Thanks to Rachel for this Frugal Baby Tip!
If you are breastfeeding in the early days it is important to check wet diaper numbers. That can be tricky with disposables. If you place a liner of flannel in between baby and diaper, it would be easier to check for # of wet dipes.
Just get some cheap flannel (Wal Mart always has it for a couple of dollars a yard) and cut out some liners to stick in the disposables. You don't even need to sew them, just use one with each diaper change and toss them out with the diapers.