It is perfectly good grammar to end a sentence with a preposition.
There are some sentences that need to be written this way, like ‘That is what I used it for.’ would be incorrect written as ‘That is for what I used it.’

Saying ‘and etc.’ is incorrect because etc. means ‘and so forth’, thus you are saying ‘and and so forth.’

Sometimes, ‘a noun and me’ is correct, like in the sentence ‘They walked over to John and me.”
However, this is the incorrect form in a sentence like ‘John and I walked away.’

However can only be used at the start of a sentence that contradicts the one before it, or with the meaning of ‘in whatever way’.
It is incorrect in the sentence ‘John is tall; however he is a boy.’

In a list, you can put a comma and ‘and’ between the last two items, or you can just write ‘and’. Both ways are correct.
In some cases, like if ‘and’ was written previously, a comma would make more sense. E.g. I would like to have some ice cream, a banana, strawberries and cream, and iced tea.

‘Owing to’ and ‘due to’ cannot be used in the same way.
‘Owing to’ is adverbial, and must refer to a verb. ‘Due to’, even though it seems to mean the same, can only be used when referring to a noun.

There is no such word as ‘quote,’ the correct abbreviation would be ‘quot.’
‘Quote’ or ‘quot.’ are abbreviations and should not be used in formal English.

‘Since’ can be used as a synonym for ‘because’, and has been used in this way for many years.

‘Got’ is now the past participle of ‘get’
In older English, only gotten could be used. This is now outdated and got is grammatically correct.

Only people are 'able' to do something. Everything else gets done.
It is incorrect to say 'The post was able to withstand the windstorm.'

The noun form of the root absorb is absorption.
All other variations of the root are spelled with a 'b'.

There is no such word as 'doctorial'. The correct, and only, form is doctoral.

'Doubt that' is not a synonym for 'doubt whether' or 'doubt if'.
'Doubt whether' and 'doubt if' mean the same thing- that there is some doubt.

The 'd' is always present in the phrase 'used to'. It is incorrect to write 'use to'.
When speaking the 'd' sound is blended in with the 't'; nevertheless it must still be written.

There are no such words as 'upto' and 'alot.' The correct spelling is 'up to' and 'a lot'.

There are five syllables in the word 'respiratory'.
Most people say the word as res-puh-tory.