How can I do good on my dental checkup 2morrow?

I just remembered I have one 2mao. I have braces, so I don't floss hardly any of my teeth, because theyre so tight 2gethet and idk how. I brush my teeth 1-2 times daily. I always get in trouble for not doing what my stupid dentist tells me 2. If I brush my teeth longer tonight and tomorrow morning and use mouthwash (act) will it make a difference on how I do 2morrow??