Acknowledge federal funding.

Writing:

Check paragraph structure.  Make sure that the first sentence of each paragraph summarizes the entire paragraph, and every later sentence is there to support the first sentence.

Do not start a sentence with a variable.

Look up the difference between "which" and "that" and check their usage throughout.

Make sure every figure or table is referred to in the text.

Provide enough details that a later student can reproduce what you did, included function names, etc.  Use appendix if needed.

Avoid colloqial language, such as instead of "we got," write "we measured."