Keep track of every single job you applied for, the company name, application date, and which resume you used. This will help you remember which job you applied for when the company calls you.
You may even want to save a copy of the job posting, as the job may no longer be active by the time you are called for a phone screen or interview.
Check your voicemail and email on a daily basis for messages. Refer to this list as you hear back from employers and use it to follow up on your applications.