Fresh start! Please help!

What are some ways I can get my body ready to start TTC? I have been trying to get pregnant for the last 3 years but all I have done is just have sex and thought oh maybe I will be pregnant but it hasn't been working out so starting today I am gonna go the whole way and go to a doctor with my husband....check to see if their is anything wrong with us then I am gonna start filling the whole daily thing on glow. But my question to you is how do I get my body ready for a baby? I got told that I should start eating better and taking prenatal vitamins.... But what else can I do? And where do I start and FYI I am badly anemic...is anyone else anemic? How can I become more healthier?(learn more on Glow: https://glowing.com)