SC2 advice for a poor multitasker [duplicate]
Solution 1:
I think the answer is somewhat subjective, but here is my take:
I personally find Zerg to demand more micro than other races. The queen requires more upkeep, and for me to use it correctly I need to remember when I actually need to Spawn Larva, on which base, need to have an exact plan of what to do with this extra larva, need to remember to spread creep all the time...
By comparison, the Terran's MULEs and Protoss' Chrono Boost are easier to use correctly (IMO).
Since these abilities (MULE/Chrono/Queen) are so essential to almost any strategy, I hardly play Zerg.
I also tend to focus on units that require less micro. With Protoss, I hardly use High Templars because they're so fragile, and if caught off guard they will simply die easily (without using their special abilities I think they don't even have an attack). I prefer Dark Templars because you can just build those and Attack-Move into your opponent's base with relative success. Also carriers are great if you can tech up, because it's easier to control relatively few units, that still do a great amount of damage.
Solution 2:
I suggested the Daily from Day[9] before, but to summarize it a little:
Hotkeys
Don't click on items! If you don't know the hotkey, hover over it, read the key that is shown there, move your mouse back into the playing field and press the hotkey.
Of course this will slow you down and you will lose a few matches, but well, you never learn without losing. I personally don't like the grid hotkeys. They might help some players, but you still need to remember the position of the command. It's easier for me to remember the mnemonic hotkeys ([B]uild -> B[u]nker => [Bu]nker, [B]uild -> [B]arracks, [B]uild -> [H]atchery, [B]uild -> [N]exus, etc.)
Grouping Units by Numbers
What you can practice as Zerg (though you might lose matches) is to store half your zerglings in group 1, the other half in group 2. When you attack, let both attack from different angles.
For macro, as explained in the above Daily, keep your command center, hatchery or nexus in group 4 or 5 and instead of clicking the command center and clicking on the worker icon (or pressing the hotkey) remember to always press 4->[S]CV or 4->[S]pawn->[D]rone.
Rally Points
I rarely use them for something different than gathering my units near my base and sending my workers to work.
It's dangerous to use them for something else because they will execute a move command so if they encounter an enemy they will just die.
For a rush it might be nice to set the rally point into the enemy base or at least close, but as i don't rush i can't tell much about that.