All of the Above

< IMHO>
Send your cover letter, resume and salary history in a word doc, all as one file so that none of the parts can be separated from the others. Then send in the email, the gist of your cover letter, with the .doc attached. Have the subject line be the title of the position you are going for.

Then contact the person you sent the letter to, or someone in the hire/fire department and try to speak with someone to verify that they recieved your letter, and ask when they may be making a decision on the position. This way, they know your name, they (hopefully) looked for your resume with you on the phone and can associate your resume, voice, and name, which will (hopefully) have sticking power.

Then, call back later next week to check in, and keep your name out there.

Unless you don't really care about the job, then just send it in email and fuck it.
< /IMHO>

So Say We All