How to get a nikon d3100 pictures to not be blurry?

I just got my Nikon d3100 a few days ago and it seems to be very blurry now.the pictures are not nearly as good as they were yesterday.how can i get them back to the way they were before?

См. статью: How to get a nikon d3100 pictures to not be blurry?

Good quality and focusing cameras?

I want a really nice quality camera like this;

http://www.bestbuy.com/site/Nikon±+D5100+16.2-Megapixel+DSLR+Camera/2553883.p?id=1218336884671&skuId=2553883

but those are very expensive.

are there any good quality, great focusing nikon or canon [or any other good brand] cameras under $400?

again, i am looking for something that has very good quality and focus.

[i don't want one off of ebay or dealdash or anything like that.]

thank you!

См. статью: Good quality and focusing cameras?