I agree with pretty much everything said above...
I have a friend with a Cherokee 160 who wanted to fly somewhere that had a "short runway" (or so he said). I looked at the runway length in ForeFlight (2100 ft), and compared it to Piper's published performance data for his airplane. The book showed roughly 700' landing distance would be required. Personally, I generally make my "go / no go" decisions for a "new to me" airport based on the "over 50-foot obstacle" distance published in the charts, but even that showed only about 1300' required to land over a 50-foot obstacle... I told him what the charts showed, and asked why he was concerned about flying there. He said it was because he found the "book figures" to be WAY too optimistic – that he could not get his Cherokee down and stopped in under 2000 ft even at our home airport's 580' field elevation!
We then had a good discussion about his pattern flight and landing technique. Basically, he was taking the published final approach speed and multiplying by 1.3, and flying THAT airspeed on final. I went out and flew with him, and sure enough, he was basically flying his final approach at 85 mph, then sailing 1500-2000 feet down the runway before getting slowed down to stall speed (55 mph) to be able to touch down. Yeah, using those speeds, there was no way he would have been able to land on that 2100 foot runway... But if you slowed the final approach speed to 66 mph (1.2 Vso for short fields), or even 72 mph (1.3 Vso for normal fields) it would allowed him to land much closer to the "book" numbers, and he could have comfortably flown into that "short" runway – with plenty of distance to spare!
Turns out that early Piper Cherokee B owner's manual is pretty primitive, and offers no recommendation for short field procedures. In fact, the only reference to airspeed during landing is where the "Approach and Landing" part of the "Operating Instructions" states "the airplane should be trimmed to an approach speed of about 85 miles per hour." So, without any understanding of how to determine a reasonable approach speed for himself, he was just blindly using that figure, all the way to the flare...
I explained that the "standard" approach is 1.3 times Vso, and short field approaches are typically at 1.2 times Vso, and that those would be 72 and 66 mph ªrespectively) in his airplane, so flying at 85 mph would clearly be excessive. We flew a few times around the pattern, first using 80, then 75 mph, and that reduced his landing distances significantly – by maybe 1000 feet or so. Since I'm not a CFI, I didn't push him to actually get it down any slower, but it was enough for him to realize that the training he had received was lacking, and he agreed to get with a CFI to work on it.
I learned in my own RANS S-6ES that carrying even an extra 5 mph – flying final at 55 mph versus the recommended 46–50 mph (1.2–1.3 times Vso of 38 mph) will add significantly to the "float" during landing. It also saves wear and tear on the tires and brakes!