Cultured dairy works well. I pour a bowl of cereal, blob some plain yogurt on, and add some jam to it, and that's breakfast.
I've made almond milk too. You soak the desired amount of almonds (raw, unsalted, unblanched) in water over night, then, with fresh water or with the soaking water, blend them up in a blender or food processor until it's creamy and looks like milk. You can add more water to thin it, but I prefer it thicker. It's more milk like. Then you can strain the almond meal out through a coffee filter, or leave it in. It's good either way. You can buy UHT (Ultra Heat Treated) almond, rice, soy, hemp, and hazelnut milks, and those have long shelf life until you open them. In my experience, the rice and hemp milks are absolutely dreadful, soy is okay, but supposedly messes with hormonal levels, the almond milk is fairly decent, and I have no idea about the hazelnut milk.