In editing Wikipedia it is important to understand fist and foremost that Wikipedia is an encyclopedia and therefore a reference text. As such, Wikipedia requires a specific style unique from research, argumentative, or expository papers. The following section details the expectations of editors as they start contributing to Wikipedia, whether it is adding content or citations.
When creating a new page for Wikipedia, it is essential to establish the topic's notability. This is done by proving that the topic has "received significant coverage in reliable sources that are independent of the subject."  If there has been significant coverage, demonstrated through sufficient references within the article, that is generally enough to justify an article or list on the topic in Wikipedia.
If there are not enough verifiable sources that can be referenced in the article, it may be best to start a discussion about the topic on the talk page of another related article.
Content adapted or borrowed from http://en.wikipedia.org/wiki/Wikipedia:Notability
In order to make the process of making a edits or creating new pages simpler, we suggest that new editors Create an Account. Though not absolutely necessary to edit, it is strongly encouraged so that you can establish your credentials as an editor to earn Autoconfirmed User status. One becomes an Autoconfirmed user after having an account for a certain number of days and completing a certain number of edits (subject to change based on discussion among Wikipedians). Autoconfirmed users can "create articles, move pages, edit semi-protected pages, and upload files or upload a new version of an existing file." 
Sandbox: Once you're logged into your account, you have a sandbox area, accessible through a link in the upper right hand corner of the page, where you can practice editing and draft changes. Make use of the Sandbox as a new user and then copy your changes into live entries. You can link people to your Sandbox, but it will not be searchable on Wikipedia.
Editing for a class assignment: If you are editing for a class, you can register for an account through your class WikiEdu dashboard (provided via Canvas).
Wikipedia Edit-a-thons: If you are attending a Wikipedia edit-a-thon, you can register for an account through the event dashboard (provided by the event coordinators). If you have difficulties the event coordinator should be able to provide assistance.
Note: Anonymous editing (without signing into an account) is allowed, but those edits are registered by IP address, and are subject to greater scrutiny.