Those are all fine. To choose one over another, in my opinion you have them listed in good, better, best order!

"I get by without cooking" would be equal to the second sentence. If you were to say "I get by cooking" someone would ask you "you get what by cooking?" because that is the way you would phrase, for example, "I get satisfaction by cooking", or "I get poisoned by cooking". Does that make sense?

Any others? is fine You could also ask "Anyone else?"

Form and substance

Hi. I'll be very pleased if someone could take time to read my text and help me improve it. Thanks a lot :)

I’ve always been a great admirer of the work of some painters, among them such prominent figures prominently as Munch, Soutine, and Van Gogh. What fascinates me the most about them is their talent to transcend what could otherwise be seen as a quite an ordinary scene, into something else; something powerful which is able to resonate in us -sometimes in an almost mystical way- and give us emotions whether we understand their origin or not. The “real”, once passed through the distorting prism of their genius, that some may describe as madness, appears in a very different light. Whether it’s by altering the shapes of their subjects, by playing with the colors and the light, or by making significant choices regarding the composition, they manage to drag us towards unexpected destinations. There is no more form and substance,; the form has become the substance.

Informal letter: Visiting your country

The received letter:
I’m thinking of visiting your country this summer. I’d be interested in seeing some beautiful scenary. Also, we’d like to see somewhere at night. Can you advise me on where to go, what to see and the best way of getting around?
Wishes,
Les

My answer:

Dear Les,
I’m very glad to hear that you are thinking of visiting my country this summer. As you are interested in seeing some beautiful places, I would recommend you to visit the mediterranean coast, especially somewhere closed to Valencia like Altea or Gandia.
By t There, you can enjoy stunning views, sunbathe and go to many clubs at night. By the way, I’m not sure what you intend want to say with ‘see somewhere at night”, do you want to refer to the night life? Anywhere where having to have fun? In any case, if I were you, I would ask people for the closest clubs or discos and I would go there to check if it is a good place to have fun. All of the places closed to the Valencian coast are amazing and there are a lot of places where going out the to go to party. Make sure that you are full of energy before going out because nights are very tiring and you will need all of that energy.
Apart from parties, make the most of mornings and go with your friends to see the city of Valencia, if possible. You won’t regret it, as people are very friendly and are always are willing to help people. {not sure what you intend with this: for some misunderstanding}. Please, remind remember to go to the Cathedral.
Have fun and I hope to see you very soon.
Best wishes,
Ruben.

Presentation

We have too many meetings at work. I can hardly go back home at the regular time. Our meetings are too long. I'm sick and tired of them. I have to prepare for my presentation of for next week, too. We have so many meetings that I can't get any work done. I wonder if I can make [okay, but finish might be better] my presentation or not.