I'd like to see an NFL team employ a strategy where they never punted if they were on 40 and 4th down was no more than 5 yards. Once at 50 never punt unless 4th was over 10 yards. Also always go for 2. Don't think the onside kick thing would work but it would be interesting if a team committed to 1 onside kick per game at a random time in the game. Would have more success early in the season, but then late in the season it may result in better field position (for the D) since teams would constantly be scared of the random onside kick.