Spanish future tense help please?

I'm writing an essay on healthy lifestyle and the like, but I'm just a tad stuck on what to say to include the future tense (both immediate and simple).

Could anyone please help me on how to say anything from this list:

I will exercise more next month, which will make me healthier.
I will never smoke because I understand its effects.
I will eat less fast food and try to eat more vegetables.

Or anything along the lines of health?

Much appreciated...

I'm writing an essay on healthy lifestyle and the like, but I'm just a tad stuck on what to say to include the future tense (both immediate and simple).

Could anyone please help me on how to say anything from this list:

I will exercise more next month, which will make me healthier.
I will never smoke because I understand its effects.
I will eat less fast food and try to eat more vegetables.

Or anything along the lines of health?

Much appreciated...

Comere menos comida rapida y probar comer mas verduras.

I will exercise more next month, which will give me a balanced lifestyle. = Haré mas ejercicio el mes que viene, lo que me ayudará a llevar una vida sana y equilibrada.
I will never smoke because I understand its effects.= Nunca fumaré porque entiendo sus efectos.
I will eat less fast food and try to eat more vegetable=Comeré menos comida rápida y trataré de comer más verduras/hortalizas.

"Voy a hacer más ejercicio para que estoy sano" which means "I am going to do more exercise so that I am healthy". (Not exactly what you wanted to say but it basically has the same meaning).
"Nunca no voy a fumar porque..." which means "I will never smoke because" but I'm not quite sure about how to say that I understand the effects.
"Voy a comer menós comida rapida y voy tratar de comer más verduras" means "I will eat less fast food and I will try to eat more vegetables"

I'm not sure how accurate that is because it's been two years since I did Spanish but I tried...

Apart from accents, that's incorrect.

"Comeré menos comida rápida e intentaré comer más verdura."

or

"Comeré menos comida rápida y trataré de comer más verdura."

"Probar" is more like try some food (have a bit of it to see if you like it), among other meanings.

It sounds more natural to use "verduras", in singular.

Also, "entender" is more common than "comprender", which, to me, sounds Southamerican (but I'm not sure if they use that word more often than in Spain).

Cuidado con los tildes, que después no sabremos cuales están bien puestos.

Which accents are wrong?

"Voy a hacer más ejercicio para que estoy esté sano" which means "I am going to do more exercise so that I am healthy". (Not exactly what you wanted to say but it basically has the same meaning).

para que always follows with the subjunctive

That's true, but it doesn't sound natural at all that way.

As a native speaker, this is the way I'd say it:

"Voy a hacer más ejercicio para que esté estar sano"

menós --> menos
rapida --> rápida

There are also some grammatical mistakes in your sentences.

Well like I said, I knew it probably wasn't that correct because I haven't touched Spanish for two years but I was bored so I thought I'd try.

Which accents are wrong?

That's true, but it doesn't sound natural at all that way.

As a native speaker, this is the way I'd say it:

"Voy a hacer más ejercicio para que esté estar sano"