There are tons around here, I think Glass Owl may have even compiled a bunch of 3 card spreads around here somewhere!
One that I used on a whim, which worked very well for me is something similar to the past, present, future spread but focused on a specific topic.
One night my best friend called me in a panic, because her uncle had been found in his cabin, "not breathing". Earlier in the day, he had made mention to my friend's mother that he felt like he was going to die that day... and so of course, my friend's head was spinning with what could have happened to him, and what was going to happen to him... I pulled this spread:
1. What happened: 10 of Wands
2. What's happening: King of Wands
3. What's going to happen: 4 of Cups
I told her that he had passed out from dehydration, that he was awake and alert now, and that she would find him and his fluids stabilized with IV's in the hospital. I used the Gilded tarot, and the person in the 4 of Cups looks like someone sitting propped up in their hospital bed, watching TV.
Turns out, that because her uncle had thought he was going to die that day, he had decided to throw himself a party, with lots of drinking- he dehydrated from all the booze, and when she went to the hospital, there he was- sitting propped up in his hospital bed hooked up to an IV, watching TV.
It's not much, but it worked extremely well for me, and since you mentioned the past, present, future spread, I thought you might like this one. It's very good if you have a particular focus/subject you'd like to read on.
Hope that helps you out a bit!