How do I create a 300 DPI image? ?

Question: How do I create a 300 DPI image!? !?

I used photoshop to create a logo for my business!. I need to print business cards but vistaprint!.com requires 300 DPI!. How can I create the same image at this resolution!?
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Best Answer - Chosen by Asker:

You should have started with a blank canvas at 300 dpi!.

Changing later to a higher DPI is not a good idea!. The computer has to make up the missing pixels!.

Most printing business require a pdf file for printing!. You can save your Photoshop as a pdf!.

Again, rather than using Photoshop it would have been much better to have used Adobe Illustrator!. Illustrator creates Vector Art (which has unlimited enlarging ability) unlike Photoshop which uses Bit Map!.Www@QuestionHome@Com

when you go to export image!.!.!.type in 300 dpi where it prompts you to!.Www@QuestionHome@Com