You just need us to name episodes, right?
In that case:
First and foremost, I need as many clips as possible of Clark opening his shirt to reveal the S. (In a pinch, Clark changing into Superman on screen will do.)
Off the top of my head (and I know this because I've used most of those clips myself, I'm not
that obsessed with the show):
- in HiM before the tidal wave hits
- in ASU after he regains his memory
- in Lucky Leon after Lois calls him interrupting Mayson's declaration of love
- in TaGD after Clark tells Lois that he doesn't care where they live as long as they're together--it's Lois who opens his shirt for him
- there's another one that they use in the credits, but I don't remember the episode--it's the one where he jumps the barricade, ripping open his shirt
- in Tempus Fugitive after they've stopped Tempus
- in Contact when he dives after Lois who's just jumped out the helicopter
- in BACALAC there's that scene where both he and Lois are dressed in leather jackets and she has that hideous hairdo and he hears a call for help and needs to leave, so he rips open the shirt and she's like, "I love it when you do that!" or something to that effect
I'll let you know if I think of any more.
I could also use shots of Clark wearing a hat. Are there any instances other than Soul Mates at the Pilot?
As Clark, he rarely wore hats. Your best bet would be to check episodes where he went undercover, like IGACOY, where he wore a hat when he was pretending to be Charlie King or in Operation Blackout when he dressed in that military get-up. In LotF he wore a baseball cap.
Superman lifting someone by the neck. I have a clear memory of him doing it (and then the guy says "oh, you gonna lift me again?") but I can't remember who it was or what ep it was in.
He does that a lot but at the moment I can think of only one specific instance: in Meet John Doe he does it to Tempus when he tells him to stay away from Lois. Edited to add: I think the scene you're thinking of involved the Prankster--it sounds just like something he would say. Check those episodes.
Lois driving off a cliff (was that Contact?)
Nope, that was MJD.
I'll think about the others and get back to you.