Tips for someone who just quit smoking?

I just quit smoking last night after I looked at the cigarette in my hand and realized how shitty it's been making me feel. I kept looking for the next moment I could have a smoke and it was never anything that satisfied me when I found that moment. It took the realization of how fucked up my lungs and body feel for this to hit me. I'm 22 and have been smoking off and on for 5-6 years. I am very motivated to keep on track and I have my girlfriend's support as well, but I would like to know if there are any hacks for someone who just quit. Thanks.