Meatless protein options to sustain a vegetarian diet

I am contemplating becoming a vegetarian again.

I tried it a few years ago, but I did it all wrong -- subsisting almost entirely on pasta and tomato sauce and cucumbers. My hair fell out and my lips cracked. This time, I want to do it right. Lack of protein was one of my big downfalls last time, and this website has some great tips to add meatless protein easily into the vegetarian diet:

1. Whole grains -- Oatmeal with milk and sunflower seeds, or melted cheese on brown rice. (2nd option = yummy)
2. Milk and yogurt -- Add to soups.
3. Legumes -- Substitute soybeans for ham hocks next time you make split pea soup.
4. Seeds -- Add sunflower seeds to meatless chili!
5. Peanut butter -- Add to grains and soups or serve warm as a dip with fruit.
6. Tofu -- Toss in a blender and add to salad dressings!

There are some great ideas in there, and I'm going to read some more ... but first I want some melted peanut butter and strawberries, excellent!