I have never had an engine failure, but have had a tank-in-use fuel blockage, and fuel starvation due to an empty tank - both fixed by changing tanks. I've had power loss due to carburetter gasket leakage, which allowed me to return and land. I've had a power loss which I thought was carb icing, but when it didn't respond to carb heat, I tried aggresive mixture leaning, which on return to normal richness allowed me to make it to my destination.
On a check-out with an instructor two years ago, I was given an engine failure at over 3000'. As I trimmed for 70 kts, I said what I would do - carb heat, mixture rich, fuel pump on, change tanks, try one mag if miss-firing - the instructor grabbed the yoke, and told me if it was real I would be in a panic, and to just select a field I replied that so far I had always managed to keep the engine going.