Sokka's morning begins with Momo shoving it's hand in Sokka's mouth and it just gets progressively worse from there. Soon they're being attacked by Fire Benders, and while that's nothing new, it is not exactly how she wants to spend her first few minutes of the day. They get away, and Katara remembers her scrolls, and Aang liberates his staff, but when Sokka realizes that she has left her boomerang behind, any joy from escaping leaves her.
Sokka knows they have no time to go back and get it, but it still hurts her to leave it behind.
The day gets progressively worse. Aang gets arrested, Katara keeps solving Sokka's mysteries, and when she gets to Kyoshi to prove Aang's innocence, she upset to learn that Suki isn't there. And then when they try to get Aang to use all the evidence they found, he doesn't exactly pull it off successfully. Then Kyoshi herself appears and admits to the crime. Everything looks pretty terrible.
And then it gets worse.
The fire benders who attacked them that morning show up. The trio does their best to fight against them. Sokka even manages to get the archer to set their bag of explosives on fire. After that, a bag lands next to her and she sees her boomerang sticking out. "Boomerang!" She says grabbing it. "You do always come back." The trio gets rid of the gang that calls themselves Rough Rhinos and Aang doesn't get killed. It's a successful ending to a day that started horribly.