Tip of the moment...
Page history

If you want to compare the differences between two revisions of a page, click the history tab at the top of the page, then select two checkboxes to mark the revisions which you want to compare. Alternatively, click the (cur) link to see the differences between a revision and the current (most up-to-date) revision, or the (prev) link to see the differences between a revision and the previous one. You will see two columns of text next to each other, with any changes in red. You can also view the drafts on their own from that page, or change which versions you are comparing. Just be aware that changing templates and images are not recorded.

To add this auto-randomizing template to your user page, use {{totd-random}}
Time-saving links II

Sometimes you may be editing an article and want to link a plural to its singular form. For example, 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 instead by writing [[puddle]]s.

This also works with adjectives (for example, [[Japan]]ese), regular verbs in present or past tense (for example, [[dance]]s or [[dance]]d) and any other suffixes or prefixes.

However, this method does not work with spelling changes, for example: [[try]]ied does not work; you have to enter [[try|tried]]. It also does not work with possessives, so you may want to use [[Fred Foo|Fred Foo's]] to get Fred Foo's. Using [[Fred Foo]]'s will look like Fred Foo's, i.e. the possessive suffix unlinked, in plain text, and black instead of blue.

Note: if a redirect exists from puddles to puddle you don't actually need to do any piping, it's fine to link [[puddles]] too.

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To add this auto-updating template to your user page, use {{totd}}