Basically, adhere to reddiquette.
No NSFW links.
You must include the name of your nostalgic item in the title.
No posts to webstores, blogs or websites with nostalgia items. No polls please.
Do not flood the subreddit with posts. A limit of 5 posts per day is reasonable.
No memes and no compilations of multiple items such as "starter packs."
A meme by definition is a humorous image, video, piece of text, etc., that is copied (often with slight variations) and spread rapidly by Internet users.
There is no rule against reposting, but mods may tag posts as "frequent repost" or even remove it if it has just been posted.
No posts from any personal YouTube accounts or other platforms. This includes commentary, reviewing, reaction and ranking channels. No playlists or custom art work of any kind.