Sounds like you know what to expect from past quits. The #1 Golden Rule we all need to adhere to is --- not one puff ever. Smoking is an addiction to nicotine (not just a bad habit) and that first puff or cigarette leads eventually to the next, and the next, and the next for most addicts.
Knowledge really is power. I encourage you to read how & why we get physically & mentally addicted and what we can do to help ourselves (the article "Addiction 101" on the why quit.com site is long but I found to be very helpful & insightful). And then read some more to actively change how you see smoking (for what it really is). For me, the "switchover" in thinking & perspective was hard won but worth all the work & angst it took to change myself to no longer even want to smoke. I know someone who quit for 15 years but always felt like she was missing out, that it wasn't fair, was resentful, and really struggled at times using only her will power to remain quit. IMO will power is not the way to go. Willingness & free choice is the path to an eventual long & peaceful quit. That is the true victory.
You can remain smoke free. You will never have to redo the early days. Keep going.