Now that you've told me what you meant, here is how we can correct your sentence:

For dinner I am going to boil some spaghetti.  Now when that my husband has left me I do not need to buy any tomatoes or cucumbers, which I means I can economize.

Small Writing? A short letter/note.  Could you Please help me. Many thanks in advance

I hope this letter finds you and yours in good spirits and in good health.

I woke up early today as I had to go to usual for work. It was still dark and cold in the room. I woke up my daughter in order to take her to her as well for her kindergarten. I had muesli for my breakfast and then I went took the bus to work by bus. The bus It was full as usual.

Today After the classes were over, lessons the head teacher held a meeeting. All these all meetings are so boring since they are speaking only about since nothing else but statistics were being discussed. and that's all.

In the evening, have to I must go to a the bank as I want to send some money to my Ukrainian relatives. who live in Ukraine,

As for dinner, just I am going to some boiled some spaghetti spaggeti. Now when that my husband had left me I do not don't buy any tomatoes or cucumbers I mean so as to save some money. I can economize You know how expensive they can be at this time of the year.

That's all my boring news My boring stuff at this end.

Take care and keep in touch.

Could you help me with this entry? Many thanks in advance

I hope this letter finds you and yours in good spirits and good health.
I woke up early today as I had to go to work. It was still dark and cold in the room. I woke up my daughter in order to take her to kindergarten. I had muesli for my breakfast and then I went to work by bus. The bus was full as usual.
Today after lessons the head teacher held a meeeting. All these meetings are so boring because they only speak about statistics.
In the evening I must go to a bank as I want to send some money to my relatives who live in Ukraine,
For dinner I am going to boil some spaghetti. Since my husband left me I can economize by not buying tomatoes or cucumbers.
That's all my boring news
Take care and keep in touch

The English in this entry was to a very high standard and everything made complete sense. Your news isn't boring! Good job.

I hope this letter finds you and yours in good spirits and in good health. 

I woke up early today as I had to go to work. It was still dark and cold in the room. I woke up my daughter in order to take her to her kindergarten. I had muesli for my breakfast and then I went to work by bus. The bus was full as usual.
Today after the lessons [1] the head teacher hold held a meeeting. These all All these meetings are so boring since they are speaking only about statistics and that's all [2].
In the evening I must go to a bank as I want to send some money to my relatives who live in Ukraine,.  
For dinner I am going to boil some spaggeti spaghetti. Now when my husband left me I do not buy any tomatoes or cucumbers I mean I can economize [3].
That's all my boring news. 
Take care and keep in touch. 

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[1] To be honest, I am not certain whether "Today after lessons" is okay.  Even if it is okay, it sounds a little weird.  I would write, "Today after school".

[2] Because you said the meetings are "only about statistics", it is not necessary to add "and that's all".  For example, either of these sentences would be okay:

"The meetings are only about statistics."

"The meetings are about statistics and that's all."

The first sentence above is much better.

[3] Unfortunately I do not understand the meaning of this sentence.

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Your English is getting better and better.  Well done.