Ask HN: How to discipline yourself while working alone?

Electrodes wired to sensitive bits, and a shockbox with a momentary switch sitting on the desk beside the keyboard, for convenience while working. Break out the whips and sticks for short "refresher" breaks and a quick workout and stretch.

Reserve the scourge for when you really need to get the blood flowing and regain intensity.

Set daily/weekly/monthly (Each one) goals and reward yourself for meeting and exceeding goals.

Short terms goals and willing to make them real will push you everyday.