David Pogue in the New York Times put together a list called: Tech Tips for the Basic Computer User. It’s a good list. If you don’t know this stuff, you should.

* On most cellphones, press the Send key to open up a list of recent calls. Instead of manually dialing, you can return a call by highlighting one of these calls and pressing Send again.

* You can tap the Space bar to scroll down on a Web page one screenful. Add the Shift key to scroll back up.

* When you’re filling in the boxes on a Web page (like City, State, Zip), you can press the Tab key to jump from box to box, rather than clicking. Add the Shift key to jump through the boxes backwards.

* You can adjust the size and position of any window on your computer. Drag the top strip to move it; drag the lower-right corner (Mac) or any edge (Windows) to resize it.

* Forcing the camera’s flash to go off prevents silhouetted, too-dark faces when you’re outdoors.

* When you’re searching for something on the Web using, say, Google, put quotes around phrases that must be searched together. For example, if you put quotes around “electric curtains,” Google won’t waste your time finding one set of Web pages containing the word “electric” and another set containing the word “curtains.”

* You can use Google to do math for you. Just type the equation, like 23*7+15/3=, and hit Enter.

* Oh, yeah: on the computer, * means “times” and / means “divided by.”

* If you can’t find some obvious command, like Delete in a photo program, try clicking using the right-side mouse button. (On the Mac, you can Control-click instead.)

* Google is also a units-of-measurement and currency converter. Type “teaspoons in 1.3 gallons,” for example, or “euros in 17 dollars.” Click Search to see the answer.

* You can open the Start menu by tapping the key with the Windows logo on it.

* You can switch from one open program to the next by pressing Alt+Tab (Windows) or Command-Tab (Mac).

* You don’t have to type “http://www” into your Web browser. Just type the remainder: “nytimes.com” or “dilbert.com,” for example. (In the Safari browser, you can even leave off the “.com” part.)

* On the iPhone, hit the Space bar twice at the end of a sentence. You get a period, a space, and a capitalized letter at the beginning of the next word.

* Come up with an automated backup system for your computer. There’s no misery quite like the sick feeling of having lost chunks of your life because you didn’t have a safety copy.