You can cut out a lot of filler words and squeeze more in if you found the 900 word limit prevented you from saying everything you wanted to. For example, "I get a lot of joking from family, friends and even coworkers" you can take out "even" and get an additional word, or rewrite it shorter to say "Family, friends and coworkers tease me". Stuff like that can add up and gain you another paragraph. Another example: "Emulating a pre-agricultural diet was a pretty substantial change for me. Here is what the Paleo diet means for me." Take out the word "pretty" and the entire next sentence that starts with "Here". Your thoughts come through a little stronger without those fillers.
Female, 5'3", 50, Max squat: 202.5lbs. Max deadlift: 225 x 3.