I think it might be protein. Protein gives you a different more sustained energy than carbohydrates, which is better for energy dip controlling (blah blah blah we all know.. haha). Looking back on these past weeks: I ran out of soy milk and tofu early last week. So, its been maybe a couple of servings of beans total. Oops.
I had issues leaving the house due to my back, I felt bad spending money, I wanted to avoid the processed meat replacers. I.. I... excuses! I need to take care of myself! I caved and bought some of those boca (vegan) and morning star burgers (spicy black bean) tonight, as well as replenishing my stock of soymilk and tofu (on sale?!). I boiled a huge pot of beans to jar and have available for the week. Go me! Hopefully next week will go better.
I found some interesting articles on how to make sure you get enough protein and how protein is available in plant form (a discussion of incomplete vs complete and complimenting proteins). I liked this article because finding protein was one thing I was worried about when I started cutting out yogurt and fish. Especially because I like to work out. I super liked this graph I found article at savvyvegetarian.com (I'm a visual person :P):