Skill:
Pin-point or layout your core skills
Find your platform:
If you have some skills then sign up for Fiverr, Freelancer, Upwork, or peopleperhour. There are a lot more sites like these.
Research:
Search for keywords related to your skills and do extensive research on pre-existing offers.
Create:
Create your own gig / offer.
Improve:
Improve your offer based on your research findings.
Optimize:
Optimize for conversions. Optimize the SEO / landing page.
Convert:
Reply to inquiries on time. Answer the buyer's questions. Be professional. Send them your offer and they will accept / approve based on your expertise and professionalism.
Get Reviews / Testimonials:
Get the ball rolling by asking for reviews and testimonials. This will help you in getting your next sale / close faster.