updated contributing.md

contributing.md

@@ -8,9 +8,15 @@ project you agree to abide by its terms.
 
 Ensure your pull request adheres to the following guidelines:
 
-- Make sure you take care of this
-- And this as well
-- And don't forget to check this
+- Ensure that the content you are submitting is related to neuroscience and is awesome!
+- Search previous suggestions before making a new one, as yours may be a duplicate.
+- Make an individual pull request for each suggestion.
+- Use the following format: `[Content description](Content link)`
+- Link additions should be added to the bottom of the relevant category.
+- New categories or improvements to the existing categorization are welcome.
+- Check your spelling and grammar.
+- Make sure your text editor is set to remove trailing whitespace.
+- The pull request and commit should have a useful title.
 
 Thank you for your suggestions!