Advice from David Given:

You want porridge oats instead of rolled oats. There's a difference, but I haven't quite been able to work it out. Scott's is the best, but it may not be available in leftpondian districts. Don't believe anything anyone tells you about salt. Sprinkle with sugar instead. A handful of raisins or sultanas can improve it, too; and you may be able to do creative things with cocoa and cinnamon.