This is one part of the series "Tips for learning English". The series is today created in the sake of collecting and assembling tips which come from English learners. Post your own tips which really work  Other members can learn from them, and if necessary we could discuss 

You are in VOCABULARY section  .

"One ought, every day at least, to hear a little song, read a good poem, see a fine picture, and if it were possible, to speak a few reasonable words."
Johann Wolfgang von Goethe (1749 - 1832)

English Vocabulary lessons: http://www.englishclub.com/vocabulary/

Study prefix, suffix and root. Let's look at Latin root cadere, to fall.

When a man falls into a ditch, we say it is an accident; and is accidental. The side the sun falls down is the west, so we call the people who live in the west, westerner or occidental. Both accidental and occidental have the same Latin root, cadere, to fall.

We call Asians Oriental because they live on the side the sun rises or originates.

Let's look at pedal. The root is ped, foot.
If you have something on your foot, say it is shackled, you can't go anywhere. Impede is to hinder, the word is from in, in + ped, foot. When that shackle is removed, you can move fast, so the word expedite, from ex, out of + ped, foot, is to hurry up. Please expedite, this letter must go out ASAP.

If you know accident and pedal, it is easy for you to memorize occidental, impede and expedite. Do you want to be a podiatrist? That is a foot doctor (medical doctor). Pod is foot.