Get around 20 hours of primary care shadowing, see if you can maybe get a poster out of that research (minimal boost), maybe start a clinical job after you graduate in December (congrats on almost graduating!), other than that your ECs are pretty set!
Do you have any hobbies or anything that you can talk about to make you stand out? Mountain climbing, aquaponic gardening, dance, flautist, Avid karaoke-Er?