All the things on this list can be learned by every player regardless of rank. If you can learn and apply it to your games, you'll start to see immediate results.

1. Economy. It decides when to buy/save/light buy.

2. Bomb defusal (3.5 secs to half, 7 secs for full defuse). If you are not sure if the defuser is sticking it, look at the color. Blue = not defusing, Red = defusing.

3. Ability/Ult timings and approx cooldowns for every agent.

4. Sounds for the different areas on all the maps.

5. Default plant spots for every site on every map.

6. Best plant spots on each site that's not default (Safe to plant = Safe to defuse, so if you have time plant in the open) Open plants are easier to defend.

7. Ability and Ult damage (Tells you how much damage you can tank when trying to defuse the bomb)

8. Map callouts including community made ones.

9. Popular off angles for each site on every map.

10. Knowing the sounds each ability makes.

Bonus:

1. Learn to jump peek.

2. Learn to turn flashes.