Episode 3 of the TWiT network’s iPad Today podcast included some handy Tricks and Tips, prompting me to search out some more.  Here are my favorites:

• Swipe up on the comma/explanation mark key on the virtual keyboard to insert an apostrophe.
• Tap with more than one finger on the spacebar to insert multiple spaces (for tabbing, traditional end-of-sentence spacing, etc.).
• Tap on the title bar in Safari to jump to the top of the page.
• Tap four times to select a paragraph for cut and copy.
• Hold down the .com key when entering a web address to get additional choices.
• Hit both shift keys simultaneously for CAPS LOCK (or change one of the Settings to double-tap the shift key).
• You can tap the “screen dots” below the icons to switch screens.
• Press and hold ‘-‘ and then a subset appears (much like the .com button hold) and you then have access to long dash (—) and the bullet (•).
• Press and hold period to get ellipsis (…).
• Press and hold apostrophe for other apostrophe styles.
• Press and hold a letter or punctuation key for various diacritical marks and alternate language marks.
• To insert a symbol with only one keystroke, press and hold the .?123 key and then drag your finger to the mark you want and release there.  It inserts the symbol and returns to the usual letter keyboard.