Admittedly, I haven't yet read the links provided above and so I may be repeating myself here.
But I like "pervertables" which are items from Home Depot, or the kitchen, that provide an interesting spanking experience.
The curved (and absolutely wooden) hairbrush.
A spatula.
A HUGE wooden spatula (will cause tears, usually) with a flat base. Included in that are wooden spoons and even plastic spatulas can carry a punch, so to speak. These can also be used for CBT (cock and ball torture).
For actual spanking, the type that true blue spankees like, well it's all different.
My favorite spanking tool of all time has been a leather strop.
Asian rug beaters.
Yes ... a THICK heavy flogger is grand for sensual spanking. Letting it flow over the back of a friend, inside his thigh.
Make them anticipate your moves.
Also, I learned most of my spanking tips FROM my client base, including a few people that are active on this board.
So ask what the client prefers.
Some guys like leather, some prefer wood. Many adore a hand spanking, over the knee, with their hard cock rubbing against your legs. Pull their pants down to their ankles before beginning.
Warm them up, first!!!
Just a few really quick ideas for you and I hope this helps.
Oh, finally ... I'm a giver.
Have fun,
Elisabeth