The "dispute resolution" sidebar (right) has direct links to filing requests for many of the dispute resolution levels, but requesting dispute resolution involves different guidelines and application processes for each level. Dispute resolution requests can help familiarize you with each of them.
When you find a passage in an article that is biased, inaccurate, or unsourced the best practice is to improve it if you can rather than deleting salvageable text. For example, if an article appears biased, add balancing material or make the wording more neutral. Include citations for any material you add. If you do not know how to fix a problem, ask for help on the talk page.
To help other editors understand the reasoning behind your edits, always explain your changes in the edit summary. If an edit is too complex to explain in an edit summary, or the change is contentious, add a section to the talk page that explains your rationale. Be prepared to justify your changes to other editors on the talk page. If you are reverted, continue to explain yourself; do not start an edit war.
Talking to other parties is not a mere formality, but an integral part of writing the encyclopedia. Discussing heatedly or poorly – or not at all – will make other editors less sympathetic to your position, and prevent you from effectively using later stages in dispute resolution. Sustained discussion between the parties, even if not immediately successful, demonstrates your good faith and shows you are trying to reach a consensus. Try negotiating a truce or proposing a compromise through negotiation.
Do not continue edit warring; once sustained discussion begins, productively participating in it is a priority. Uninvolved editors who are invited to join a dispute will likely be confused and alarmed if there are large numbers of reverts or edits made while discussion is ongoing.
Take a long-term view of the situation. You will probably be able to return and carry on editing an article when the previous problems no longer exist and the editor you were in dispute with might themselves move on. The disputed article will continue to evolve, other editors may become interested, and they will all have different perspectives if the issue comes up again. Even if your position on the article is not accepted, it might be in the future.