If you're not currently working, you might not feel like you've accomplished anything if you haven't applied to a multitude of jobs in one day. And, while this approach might have worked for landing a job during high school or college, it's not a very effective method for searching/applying for a career position.
It seems counterintuitive, but if you spend less time on the job search but really focus that time on applying for positions that are the right fit, you'll be more successful in getting an interview.
Rather than applying for 12 jobs in one sitting because the job titles looked interesting, take the time to instead read through job descriptions before you apply. Scan the qualifications section to make sure you actually have the education, experience and skills that the employer is looking for. If you don't meet that employer's requirements, then chances are that you are not a good fit for that position. It would be a better use of your time to move on and look for other positions for which you're a better fit.
Taking the time to also tailor your resume toward a position before applying will greatly increase your chances of being called in for an interview. Keep in mind that employers don't call you in for an interview to find out if you have the right experience - the resume should tell them if you have the right experience. So if you have experience with the duties and responsibilities listed in a job description, then make sure that experience is reflected in your resume before you apply!
By getting focused, finding roles for which you're a good fit, and tailoring your resume toward positions, you'll reap greater rewards. Yes, you'll be applying for a lower number of positions, but you'll land more interviews by being targeted and making yourself a more desirable candidate through the resume tailoring process.