Why are you asking if you already have one? You created this Medium article today and I think your decision of making your first post as a "giveaway" announcement is already a bad idea. Yeah sure the readers would know that you'll be giving away your tokens but in exchange it will fail to highlight your token itself because people will be focusing on the "free" money they are reading. Your first article failed to even say something about what Tantum Digital is which for a giveaway contest is also another bad move, most of the readers who don't even know what cryptocurrencies are will fail to understand what kind of prizes/rewards your giveaway have for them.

The most general requirements would be don't do anything stupid, and do it correctly. To be specific, well, I don't have to iterate what "stupid" means right? Up to you to decide on that. Correctly basically means that information is complete and all requirements are passed out. Just imagine it as creating a research paper for a thesis, it needs to be solid, backed by facts, everything is relied upon by data, and no false information is disclosed no matter what.

Not in the announcement part but before doing as such, might as well prepare a plan for at least 2 - 3 years ahead. Show the people that you actually have something planned, not the notion of your only going to plan after getting the recognition of the people.

How about you hire a marketer who would handle the publicity of your new token? That way you'll be getting professional service for your project rather than random replies from other members of the forum. You can use the service section already linked on this thread to scout for someone to fill that position.

I think you should developing your whitepaper as it is the most vital requirement in creating such tokens. Whitepaper must cover every essential research and knowledge of experts that argues or giving a specific solution to certain problem. After doing so, you can now create and share the information apropos to the token you are advertising in the market.

Take a look at this

[1] Announcements (Altcoins) > Tokens (Altcoins) --> it'll give you some idea of what to include in your announcement.

[2] Services --> You can use other services of other forum member if you wanted to create aesthetic materials such as website, signature or announcement.

I hope this answers your question.

It should focus on uniqueness and features, with so many tokens and coins announcement in the past, some new projects are just copying other's works, people are always on the search for a new project and they are more on what unique feature that they can offer to the community, but beware copying other's works will end you inn the scam section, scam busters always look if you plagiarize other's works.