I was fortunate to learn a lot of self reliance from my parents. They lived through tougher times than anything I've experienced. My dad taught me to repack the hubs on my bike, usually when the Bendix brake started making noise. He'd hold the ball cage in the palm of his hand, take some grease with his thumb, and press it into the middle. The old grease would squirt out as it was displaced by the new grease, then it went back into the hub.