How can I perform cheap transactions (tx) and create different contracts on Starknet?

Hello everyone,
I'm continuing my tutorial series on frequently asked questions.
In this tutorial, we'll explore in detail how to create affordable transactions on @Starknet. :)
Let's see together what we can do.

1.Project: StarknetID

You can get yourself a new ID using the "ADD IDENTITIES" button at https://app.starknet.id/identities (This does not replace the domain). The fee is between $0.18 and $0.40. Your transaction is created quickly and conveniently, and you now have a different contract for the first time.

2.Project: DMAIL

Visit https://l24.im/GD6bitk and click on the Starknet icon as shown in the image. Connect your wallet by selecting the wallet you are using.
When you log in to the site, the first thing you need to do is to get yourself an NFT (domain).
Go to https://l24.im/XtWBL and choose an NFT name for yourself. Please note that if you choose a short name, you may have to pay a fee. If you choose a name like mine, it's free.
This NFT you obtain will be your email address.
After this stage, you need to send an email to someone. For this, you should have a Dmail email address and your Principal ID.

While you can see others' IDs on other networks, unfortunately, they are not visible on the Starknet network yet.
If you don't have any acquaintances with Dmail around you, you can contact me.
Dmail Address: 0xberlino@dmail.ai

Principal ID: w2hq5-mlkly-g5wrb-o5vyb-kx7ir-xdhny-dzoed-wmnrz-sai2x-ehaxb-nae
Feel free to email me. I'll try to get back to you when I'm available.

Go to https://mail.dmail.ai/compose, enter the above address, and write the Dmail address along with the Principal ID from the previous post.

Write the subject in the "Subject" field and enter your email content below. By clicking the "Send" button and confirming from your wallet, you will complete the transaction at a very reasonable cost.

3.Project: StarkRekt

https://starkrekt.com/ is a new project. It is a project that removes the approval permissions made with your wallet and protects the security of your wallet.

Connect your wallet from the top right section.You will see which permissions you have granted from your wallet automatically. You can revoke one each day using the 'Revoke' button. If you haven't done this process on the Starknet network before, there might be quite a few revokesYou can perform these actions without exaggeration and without constantly repeating the same tasks. Please avoid doing the same operations all the time. Occasionally, change the course and introduce some variety into your actions.

Good luck to everyone! ;)