Register on sites where projects of this kind are posted. A few that come to mind are: https://www.upwork.com/ https://www.freelancer.in Guru - Hire Quality Freelancers And Find Freelance Jobs
In most of these places you can upload details about your previous work and build up a network of clients. If you do a good job the clients will keep coming back for more work.
I personally get a lot of small things get done with a lot of freelancers - it's mostly about building a relationship of trust and timely work.
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