Posting field?

With the ads or with whatever you added you “succeeded” to break the code: see the validation results:
https://validator.w3.org/check?verbose=1&uri=http%3A//techtweaker.com/
Clean up your code and most likely the blog will be fine.

I have no idea how to clean it up or where to even find the code. I put those in the sidebar. The ads. Im assuming thast where the errors are?

AHA, I fixed it. I didnt have the entire html code inserted. How do I find the other errors?

When on the validation page – check the Show Source box and click Revalidate. Every line number in the error messages will be a link and taking you to the line where the error is.