Where some people get in a writing mood by maximizing their Word window, or dragging out their old Smith-Corona, I like to set my terminal to full-screen mode and crank up the font-size until my target line-length just about fits on the screen.

Right now, I'm using Envy Code R, which is one of those monospaced fonts designed to look good at a very specific pixel height, which is a lot smaller than it happens to be in my full-screen terminal right now. It's a very weird mixture of stubby, blocky glyphs rendered lovingly, crisply in super-high resolution, an incongruity that feels appropriate for a display that uses an LCD panel and 3D acceleration to emulate a VT220.