I don't know anyone who plays Scrabble exactly by the printed rules, because we always get out the dictionary and look up words. I don't think you're supposed to do that in regular Scrabble play. And the arguments about words can last for hours. Oh, the passion! Haha!
One of my favorite tricks for making up words in Scrabble is to take a verb like "automate" and add "-ing" to the end:
automating
accentuating
accelerating
demonstrating
But it's hard to get those letters to line up, you know? It's just so easy to take a word someone else has put on the board and add a letter to the end to make it plural or something:
-ed
-es
-ent
-ment
Suffixes might help you stretch a word to a Triple score tile.
It's a good idea to memorize words that start with "Q" and how you can transform them into new words. Practicing writing out "Q" words may be seem boring but if you want to do well in Scrabble it's a good exercise. For example, you can take the word "quail" and add suffixes to it:
quail + ing
quail + s
quail + ed
"Quate", an old word meaning "fortune" or "destiny", is another useful word because it can be extended in both directions:
ad + e + quate
e + quate
e + quate + d
e + quate + s
in + ad + e + quate
li + quate
li + quate + d
li + quate + s
A lot of players dread getting stuck with a "Q" but it's really a versatile letter. I rarely cannot find a place for a "Q" on the board.
For a list of "Q" words check out Scrabble Rules, a fan site for the popular board game.