If you feel that striking one specific word from the text won’t make the text any less nice and/or well-written, then you must strike that word.
On a related note, don’t use two words if you feel that one single word can replace them with no loss of text quality. (Unless you’re writing for NaNoWriMo, haha.)
Don’t use the same dialogue tag twice in a row. it stands out. Always. (Except for “said,” of course.)
If you’re including a long flashback, make sure that the readers don’t mind the main plot being stopped.
Your friends and your family can’t give objective advice on your writing. No. Listen to me. They can’t.
If your novel includes SF or fantasy elements, make sure that the occurrence of fantastical elements is made clear reasonably early in the story.
It’s not true that adverbs are inherently bad, but it is true that “he yelled” is better than “he said loudly.”
When you’re using other dialogue tags than the usual “said” or “asked,” make sure that there’s a need for the specific dialogue tag you’re using. Don’t have characters mutter their lines unless muttering is required specifically.
Most importantly: Never, e v e r follow writing advice until you understand what the thought behind it is.