You are welcome to use the Omnilicense as a license agreement for your own products and creative works. If you do not own outright the copyright on the products or creative works, you must get permission from everyone else who has some title to the copyright.
To apply the Omnilicense to a product or creative work, you simply need to include appropriate copyright and license notices in the works. How you do this is up to you. It is also recommended that you include either a copy of the license or a reference to a Web page where the license text can be read.
If different licenses apply to different parts of the work, you should make clear to which parts the Omnilicense applies and to which parts it does not.
The Omnilicense is not really designed for application to trade names and trademarks. We recommend that you make clear the distinction between the products and creative works that you distribute and the trade names under which those works are promoted.
The Omnilicense states that it is
To avoid confusion, it is recommended that you do not
apply additional terms and conditions or
contracts or patents to the licensed works.
Dual licensing is not forbidden, but should be approached cautiously because the presence of multiple licenses may confuse people as to what they can and can't do with the works.
Finally, we recommend that you do not deliberately put in place any measures that would make it difficult for recipients of your works to use, copy, modify or redistribute the works. For example, the source code of software programs should ideally not be obfuscated and digital rights management (DRM) technologies should not be applied to digital files including music and images. The Omnilicense does not prevent you from doing these things, but such restrictive measures are not in keeping with the spirit of the license.