I use 2 charts for the fridge, updated monthly. I find visual aids help the wife understand how real and tangible financial independence is, and not just "pie in the sky". I also point to the chart when she comes home bitching about her job :)
Chart 1 - History: Shows line graphs of spending, cash, and net worth by month for the last 3 years. Also has a mini chart of investment asset historical growth in the corner.
Chart 2 - Forecast: Shows net worth projections based on different investment rates per month. Has a line at the FI number so we can see how many years of work that extra $1000 a month will save us.