How do you build a waiting list to create high demand for your services?

[Btaliat]

There is a need for the freelancers to create scarcity in a competitive niche. Doing this means, psychologically you are making people start rushing you. How will you do this conveniently? Simple. You may decide to post your current works, and then capture it that, you may not have much time until a particular time. Doing this will make others want to rush you. What do you think about this? Which other things and strategies do you think can be used in freelancing?