from today on , as of today , starting today
difference !?
1.from today on (forever ? not short-term ?)
2.as of today
3.starting today (used in forever and short-term?)

Question

from today on , as of today , starting today 
difference !? 
1.from today on  (forever ? not short-term ?) 
2.as of today
3.starting today  (used in forever and short-term?)

Answer

They are all correct and mean basically the same thing - "beginning today and continuing after."
Whether it is long or short-term depends on the situation.  Usually it means long-term.

Answer

Hi, you can use all 3.

Answer

His cousin died ______ a car accident. 
What preposition do you prefer to me in the gap of the above sentence.