One of the ways mostly recommended to market a mobile app in App store or Google playstore is through a demo video. Now, the way you create and present the video is up to you. The common and most effective way to do this, is by developing a professional screencast demo video. So, what is an app demo video? It's a video demonstrating how an app works in real time. This way, interested users can watch it before downloading the application.
Most freelancers would rather work under the clients terms and overlook theirs. Well, that has been the way all along. I mean, even educational institutions teach people this - work ethnics, how to retain your job and climb up the corporate ladder e.t.c
When you repeatedly do something you become a master- and your chances of succeeding is high. It starts with first identifying a niche, then repeatedly bidding for projects that matches it. Everyday make sure you bid on 2-3 jobs that are related to your skills. Don't worry that no one is responding to your bids so long as you have adhered to the terms of service in the Freelancing site you are working on.
If there is one great advise any seasoned Freelancer will ever give you- is that there is a pattern in the Freelancing business. There is the low season and there is the high season. Both seasons may occur 2-3 times a year based on the category of service you are offering. Low seasons is that month in the year where you record low sales while high season is the one that you record high sales.