I booked my flight for a vacation (used Lufthansa.com because the price was a lot lower than cheapair.com) which cost about $630. So after booking the flight I went to Coinbase and bought 1 bitcoin.

I paid for the hotel with bitcoins on Expedia for 3 bitcoins. So I turned around and bought 6 bitcoins on Coinbase after that.

Doing it this way, I will be forced to save 50% of all of my spending.