Advice for Self-spanking (and a spanking assignment to do?)

Hi everyone!
As of lately, I had been very lazy and have been slacking off my duties, and I think I need to be punished.
Since I don’t have anyone to spank me, I decided to start spanking myself

Does anyone have some advice for that?
My pain tolerance is pretty high, and I’d need some advice on how to punish myself more painfully.
The tools I have are: my hand, a ping-pong paddle, a thick cable (basically a switch) and a ruler.

Also, based on these implements, can someone make a punishment for me?
I’ll follow it through to my best extend, any corner time or other punishments are also welcome!

[Nome Em]

My only tip for You is to use short-range toys.
Use Your wrist more at the end of the swing.