For me, it usually goes like this:
Wander around looking at costumes/fursuits by myself, and taking photos.
Look at the panel schedule, and consider which, if any, I might want to attend.
Go through the Dealer's Den. Chat with vendors and buyers. Think about what, if anything, I might want to buy or commission.
Wander/take photos some more, and/or attend panels.
Sooner or later, I will either bump into old friends, or have a nice conversation with someone new, and this will often lead into doing lunch or dinner somewhere.
Whereas Day One of any given con is usually spent largely by myself, the following days (especially the evenings) will typically involve more activities with friends, and more social or group activities.
In the evenings, I will typically attend the raves, karaoke, the dance competition, the masquerade, and/or the talent show, depending on what's scheduled.
I might visit the Dealer's Den additional times, if I feel I missed seeing some things, or if I saw something that might be worth buying.
After the con, I will be so sleep-deprived and so drained from interacting with people and being on my feet for three days straight that I will usually hole up for two or three days after the con. Then, after I've recovered, I will have minor post-con depression, and wish that the con were still going on.
After a particularly good con, I will also have this uncontrollable urge to share my photos with anyone who can be cornered long enough, so watch out

.