Another tip - make sure your resume is scannable if you're sending it in to a larger company or through email. If you don't know if the company uses a scanner, best thing to do is call and ask for the HR department and ask someone. Better to ask and know than assume.
For scannable resumes, take your basic resume, convert all text to a TrueType font (Courier, Arial or Times New Roman are standards) and remove all special formatting like bolding, italics, bullets etc. If your resume can't be scanned, it won't matter how many buzz words you use.
Always send a cover letter, even when applying through email. You can attach you resume to the email but some companies won't accept attachments. Again, you can call and ask or leave some space after the letter text and then paste in your resume. You can use the chevrons to make sure people keep reading, like
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