The experience really isn't about Starbucks .... it is about watching those daily expenses. Each day the money war rages on and armies are trying to suck it out of you. Chronicle what you spend, then go back and do an analysis. Look for those reoccurring expenses and see if you can eliminate them.
About 5 years ago, we chronicled every single penny we spent over a period of 6 months. The results were enlightening. Areas I thought we were spending poorly on, we did great and areas I thought we were doing great in, there was room for improvement. Test your assumptions.