I keep plain rolled oats, raisins and cinnamon in the cupboard at work, I've found that I don't even need sugar, just going medium-heavy on the cinnamon.
Same here, been doing this for years. Also keep some yogurt or milk in the fridge to add.
Cinnamon is a great sweetener, but take care with it. There's a lot of a chemical, coumarin, in Cassia cinnamon (the cheaper kind) that can cause liver damage in some people:
http://www.medicalnewstoday.com/articles/260430.phpCoumarin In Cinnamon Causes Liver Damage In Some PeopleWritten by Christian Nordqvist
Published: Monday 13 May 2013
"Sensitive people who consume cinnamon-flavored foods, drinks and food supplements may have a higher risk of liver damage, researchers from the University of Mississippi, USA, and King Saud University, Riyadh, Saudi Arabia, report in the Journal of Agriculture and Food Chemistry.
Cinnamon comes from the bark of trees and is sold as sticks or powder in the country of origin. Ceylon cinnamon grows in Sri Lanka, Madagascar and the Seychelles, while Cassia cinnamon comes from Indonesia and China. Previous studies have linked coumarin intake to liver damage in a small number of sensitive individuals.
True cinnamon has very little coumarin, unlike Cassia cinnamon. A 2010 German study found that on average, Cassia cinnamon powder had up to 63 times more coumarin compared to Ceylon cinnamon powder, while Cassia cinnamon sticks contained 18 times more than Ceylon cinnamon sticks."
I used to get cinnamon at Costco, but they sell the cheaper Cassia cinnamon, labeled as "Saigon Cinnamon". Now I make sure to get the true cinnamon.