If you have active-dry yeast, no worries! In a small mixing bowl, add the sugar to warm water (110°F is perfect for this and you should be able to get it from your hot water tap faucet) and sprinkle yeast over top. Let it stand for 10 to 15 minutes. Your mixture should start getting foamy or bubbly, that's when you know that the yeast is active and ready for duty! Then you can add it to your flour mixture and continue as normal.