Below are the three mistakes that beginners make when playing Starcraft 2. Fixing these elements can have an immediate impact on a player that will put them well on the road of of making it to the next level.
It’s The Economy
The economy is the backbone of your success in Starcraft 2. Having a stable source of income is the easiest way to start winning more games of Starcraft 2. There are several strategies that you can use to make sure that you will always have an income. The easiest strategy to manage is expanding as soon as you are able to. Zerg can expand very early, while Terran and Protoss can expand around the 6 minute mark with enough units to defend the expansion assuming no rush.
If you are a new player, do not focus on tech right away. Instead, create enough units to defend while getting your second expansion established. Once you have another source of income, you can start harassing your opponents expansions while investing resources into technology upgrades. Focus on building workers, then building units when you have money and once you have an extra 3/400 build your expansion.
Likewise, during mid game look to expand again at the 10-12 minute mark depending on how things are going. At this point, it does become a balancing act of ensuring you have plenty of units. If you can continually harass your opponents expansions while you work your way to three bases, you are set. Using scouting techniques on your opponents expansions will help you react at a much faster pace.
Starcraft 2 is also about speed. You do not have the luxury of being supply capped or to sit around and wait for something to happen. Be sure to plot your build systematically. Many beginners will create several pylons/depots/overlords all at once since that is the structure on their mind at the time, and they do not want to be hassle with being supply capped once combat starts.
Instead of falling victim to this beginner mistake, make sure that you are predicting when you will need to start building more supply and use that extra 200 for units, tech or expansions.
Not unlike point 2 of going fast, the biggest factor that will take beginners up a notch is by learning keybindings. This eliminates the constant and slow process of clicking on everything. It is recommended that you bind your expansions to numbers 1-3 for fast access while you are across the map fighting. Pumping out a few extra workers when you have income is almost always helpful into post late game stages.
Learn keybindings for which structures you are trying to create, or abilities you are trying to execute. Again, this saves precious seconds and will have a beneficial effect on your ability to respond to your opponent’s next move.
Also use the shift right click command with your workers to return to mining, build another building etc. This can add up to thousands of minerals mined as opposed to leaving your workers sitting all over your base area. You can also do this with the attack command so that your units can continue to attack buildings in a failing base while you manage expansions etc.
Do not make half hearted attempts at keybindings. If this was new information for you, the next game you play, make sure to look at the keybindings that you are using. Play unranked for a few games if you prefer, just be certain that you give yourself an appropriate trial by fire- it is the fastest way to learn.