Nothing better than a good spanking to get things warmed up at the start of a session. I like to be unrestrained but threatened with harsh reprisals if I move or whimper, it makes me concentrate hard and I am dripping wet in seconds.
There are many household implements that can be useful, naturally the hand and trouser belt come to mind, but there is the hairbrush, plastic or wooden serving spoon (I like the hard plastic ones best), the egg turner, flip flops or flat soled rubber shoes, handbag straps.... just to name a few that we have tried.