On each card, you'll find an astrological symbol; memorize them, as it will be beneficial when interpreting.

All Aces = Mercury
2s = Moon
3s = Venus
4s = Gaia (Earth) or the Sun
5s = Mars
6s = Jupiter
7s = Saturn
8s = Uranus
9s = Neptune
10s in the Minor Arcana = Chiron

10 = Gemini
11 = Sagittarius
12 = Pisces
13 = Scorpio
14 = Libra
15 = Capricorn
16 = Aries
17 = Aquarius
18 = Cancer
19 = Leo
20 = Virgo
21 = Taurus

In the Major Arcana, the first nine cards represent the nine planets. Then, the zodiac signs follow, but not in the order of the Zodiac.

In the Minor Arcana, the first three cards, Aces, 2s, and 3s, represent the first zodiac sign of that element.
Wands = Aries. Cups = Cancer. Pentacles = Taurus. Swords = Gemini.

The following three cards, 4s, 5s, and 6s in each suit, represent the second sign of that element.
Wands = Leo. Cups = Scorpio. Pentacles = Virgo. Swords = Libra.

The last three cards, 7s, 8s, and 9s, represent the third sign of that element.
Wands = Sagittarius. Cups = Pisces. Pentacles = Capricorn. Swords = Aquarius.

Chiron governs Card number 10 in the Minor Arcana in all signs of the element.

You'll find these symbols in the card's left corner (when the card is in front of you).

You can also discover keys to which energy corresponds to which element. Every other sign is positive or negative. There are two fundamental energies, positive or negative, which are masculine (Yang) and feminine (Yin).

Each zodiac sign is positive (+) or negative (-).

Positive is a masculine force. Positive means it's an outward-directed, active energy.
Negative is a feminine force. Negative means it's an inward-directed, receptive energy.

There are four primary colors: red for fire signs, green for water signs, yellow for earth signs, and blue for air signs.

Each card appears four times for the planets, four for each element.

The signs in the Zodiac are as follows:
Aries
Taurus
Gemini
Cancer
Leo
Virgo
Libra
Scorpio
Sagittarius
Capricorn
Aquarius
Pisces