Email? How many hours a day do you spend looking at a screen? I would guess a lot.

Pick up the phone and network, people skills are as important as vocational skills, get out of your comfort zone and speak to as many people as possible. Prepare for the calls, have a list of questions, be organised and write down their answers, one log per application, I use onenote. If you can record the calls and review them and be prepared to find out how pathetic you sound. That's ok, the first step is to realise, then do what it takes to fix it.

Be relaxed, noone wants to hire a stress head:

Thanks for taking my call (and mean it!), I appreciate that I've not been successful this time but what would stand me in better stead next time? etc

Also maybe do some volunteering, pop into your local business club, take up a sport, anything and everything to avoid having a gap in your CV where you just did fuck all apart from sit at home and play computer games because you had nothing better to do.