Keep the project description on a separate website / file in the cloud (like Google Docs) so that you can update multiple workplaces at the same time
Do a small evaluation project first with two or three of the most promising applicants
For easy spam removal towards the end of the project description, ask applicants to include a key (such as ‘#ihavereadtheprojectdescription’ as the first line of their application. Delete all applications that do not contain the key.
Also remove all applications that start with ‘Greetings of the Day’.
Make sure you work with a partner in your timezone
in the evaluation project, use fixed rewards and ask each team to do live up to the requirements in the eval project description as well as they can within the limits of the reward.