I've always found that lowering the nose to level and waiting on the sink to flare again works with Piper Aircraft.
Although I've found with Cessna holding in the back pressure on the yoke seems to kill a fair amount of that lift that keeps you in that long floating period after the bounce. The stall warning horn will be blaring at this time.
That is typically what I've found, but as usual there's no replacement for experience and that's where your judgement will develope.
A typical mistake is usually coming in too fast, you'll notice a student usually bounces after misjudging the sink after making an approach with excessive speed.
hope this helps a little!