First, some bad news: You will (likely) never be able to build a sustainable writing habit by motivating yourself — using fear, or excitement, or discipline — to handle high-friction writing. Motivation fades, and once it fades the friction will take over again and you will stop.

Well, you need dirt to grow plants. A farmer I admire once wrote that 90% of his job was dirt management. Manage the dirt well and the plants grow themselves.