Shopping – Glad to see you’re feeling all better and your back to your usual self 🙂 It’s okay to be a teen sometimes 🙂 I just did that myself yesterday, moody and all… I try to avoid coming here when I get in those moods for the sanity of the other posters here.
As for advice, try learning the deeper meaning behind these mitzvos. If its on your mind you’ll have an easier time remembering, and a better understanding of what you are doing when you do remember. And most importantly, daven to Hashem to help you! He can help you more than anyone else here can.