Give treat when your cat sits naturally – Whenever your cat sits naturally, click and give them a reward. Soon you’ll notice your cat is sitting to cue you that they want treats.

Say the "sit" word – 

Add the word “sit” once you can predict that they're going to sit. Try luring them into position with a target wand or pointing signal. Click and reward as they sit.

Repeat the process –  Eventually, using the clicker and treats, your cat will get the hang of it and even do sit when you told them to sit without the treats or the clicker.

Start by putting your at in a "sit" position – 

This position will make it more easier for them to go down to their belly.

Put a treat in your hand & slowly move it near your cat's paw – The treat will entice them to go down to their belly just to reach the treat.

Add "down" word eventually  –  

If they are already getting down to their belly a few times, you can add the word down as you put your hand with the treat on the ground and then click and treat as they successfully do it.

Repeat the process– 

As you teach them over and over, they will do down eventually without the treat when they mastered it. Just be patient and get them used to the position and the command first.

Put your cat in a sitting position – 

Yes, this can also work even when they're standing up. But isn't it a lot better to make them start at the easiest position to do the high five which is sit? Eventually they will get the hang of it.

Hold your cat's favorite treat in a closed hand  – This will make them follow and reach for the treat in your hand and as soon as their paw leaves the ground to move towards your hand, mark their action with a clicker or the word ‘yes’, followed by the treat in your hand.

Add the "high five"  word –  Your cat will eventually get used to raising their paw up to your hand. As you predict that gesture, say the word "high five" and then click as they successfully do it and give the treat. 

Repeat the process– 

Get your cat to raise its paw as high as possible and to touch your open palm as you teach them over and over. The key is to get them used to it and they'll eventually even do it without the treat too!

Start by putting your cat in a sitting position – It will be a lot easier for them to stay and wait if they are in a sitting position.

Click and give the treat as they stay for a certain time – This will be rewarding a cat for doing nothing at a certain time but to sit and wait. 

Repeat the process– Remember to click or use a release word like "okay", “done”, or a praise like good "girl/boy" before giving your cat the treat. You can move farther away little by little and increase the time of stay as they get used to it little by little.

Start by putting your cat in a sitting position – Just like the other tricks, it's much easier to shake their paw while sitting.

Hold a treat in your closed hand – The treat will entice them to follow your hand and come in contact with your hand or touch it with their paw like high five. But this time, it goes down in your palm. 

Add "shake" word and shake their paw/s  –  

When you predict them touching your hand with their paw, say the "shake" word and then shake their paws, clikc and treat.

Repeat the process – 

As they get used to this, you can eventually remove the trick and do it without the treat. Just be patient with them as they get used to doing the trick.