By counting money
There's more to life than 'consuming'; though I agree that cash is a necessary evil.
When I was younger and in the army my hobbies were judo, mountain climbing (I've climbed a fair few big peaks), and alpine skiing; though I did go through a phase of cross-country skiing, but you need lungs like a space-hopper to be any good at it; oh and I was top-notch at military shooting competitions; they used to call me the 'Jap Sniper', due to my slanty-eyes and shooting skills.
I'm now old and boring (40 next year) and enjoy gardening, caravaning, DIY... old people's stuff; however I have started running again and plan to run the Cardiff half-marathon on the 19th Oct.
I still enjoy a 'tumble' with the Missis too; is that a hobby?