I'm greatly looking forward to that day, though I'm not sure I want it to be particularly special. Sure, I could play my favorite game, listen to my favorite music, maybe bring sentimental items with me if I'm dying remotely. But if that causes me to lose focus and miss something, or for my behavior and emotions to be noticeably unusual, then I might end up failing CTB by error or intervention. So I'd probably try to keep my emotions grounded and normal, and avoid getting too emotionally invested on any attempt days. Maybe even decide whether I'm doing an attempt only moments before doing it, by way of randomness.
On the other hand, I'd be overjoyed if I knew I was successful, and I don't want pursuing and performing CTB to be something without any positive emotions attached to it. After all, they've been a significant driving force in recent times, helping reignite and preserve my motivation towards it. And in any case, I'm not completely certain I could stop myself from being filled with bittersweet joy at the thought of finally entering the realm of nonexistence.