Tired

I'm so exhausted. I'm just not managing my time well with school starting again. This morning I could barely stay awake in class, and to make things worse, I had to stay at work two hours later to make up for the lost time spent at school. No progress on my homework for Phase-Locked Loops. I will definitely ask the Prof for help after class tomorrow. I just need to get a grasp on the concepts like frequency being the rate-of-change of phase and rules that usually cannot be visualized. Wish me luck.