Let me give you a little hint.
"Where you at?"
Oh gosh, I just can't get over this one. I cannot even express how angry those commercials made me. Once you hear something on a commercial over and over and over, I truly feel you begin to hear it that way in your head and believe it's correct.
So back to prepositions. They create a relationship between other words. Believe it or not, you CAN end a sentence with a preposition. In fact, you need a preposition at the end sometime. Trust me, no one is expecting you to become Snooty McSnooterson and say, "From whom did you get that?" You really are allowed to say "Who did you get that from?" and end your question with a preposition.
Just don't clutter up your sentences when the meaning is clear without the preposition.
For example, why say, "Where did he go to?" when you can simply say, "Where did he go?" and you're understood.
Where did you get this
I will get that later
This rule also applies to the middle of the sentence, too:
To see other Grammar & Spelling lessons, click here: http://bitsycreations.blogspot.com/2011/01/bringing-back-grammar-lessons.html