Little bits can add up, but agreed, "hiding" four hundred a month is a hurdle depending on your income. If you're well into the six figures, its easy. If you're in the $60k salary I would say almost impossible.
So, let's start.
Spare change, empty your pockets before going in the house into a box in your trunk. Grab spare change lying around the house (usually men have spare change because they dump it in their pockets). Check your pockets before doing laundry. I'll bet you'll have $4-500 in six months. Thats one month of hobbying.
Pay off your credit cards in time and get a cash back card and charge EVERYTHING on that card; utilities, groceries, automatic payments, gas, everything. That should be another month of hobbling money there.
Make a periodic small trip to the grocery store and get cash back, so its not out of line with the 'regular' grocery store purchases. Thats a third trip over the course of a year.
This kind of goes along the lines of basic home finances. People get into debt, in general, not by the big screen TV and trips, but the day-to-day seepage. Starbucks everyday, maybe even twice a day is $25 a week , four times a month is $100 a month or $1200 a year. Thats four visits to a provider charging $300 a visit.
So, brown bag it, skip Starbucks, take advantage of cash back reward cards, control the seepage and you're getting up to almost once a month visits.
Prioritie