1. Magic pipe trick: Synonymous article titles may be clarified with terms in parentheses, like this: [[Self (psychology)]]. But when you want to include such a link in the body of an article, this would look rather awkward. So all you have to do is use the "magic pipe trick", like this: [[Self (psychology)|]]. Notice the pipe ("|") character stuck in there at the end of the link? That makes the link look like this: Self, without having to type the name of the link after the pipe! This trick also works with namespaces, so that [[Wikipedia:Tip of the day|]] (again notice the pipe character) displays like this: Tip of the day.
2. Plural trick: While editing, you will often need to make a link to a plural. For example, suppose you wanted to link "Fred Foo was famous for his study of puddles" to puddle; you could link it like so: [[puddle|puddles]]. However, you can save time by instead writing [[puddle]]s. This also works for adjectives ([[Japan]]ese), verbs ([[dance]]d), and any other suffixes or prefixes, like [[bring]]ing. It does not, however, work for some irregular verbs. For example, [[try]]ied does not work; you have to use [[try|tried]]. Nor does it work with apostrophes needed outside the wikilink like: [[J. R. R. Tolkien]]'s.
This page is written in British English, which has its own spelling conventions (colour, travelled, centre, defence, artefact, analyse) and some terms may be different or absent from other varieties of English. According to the relevant style guide, this should not be changed without broad consensus.