What i noticed (and sometimes catch myself doing it) Like with 4 player map. Opponent gets lots of units and places them in the centre or near infantery rock with (example) mortars on the rock. What do i do (stupid me) make also a huge army, and start attacking those units. Because of the infantery on the rocks u might loose to many units. What i should have done: make a cirkel around the units and go to his base or harvs... Then he will have the need to protect his harvs/base and he comes with his fastest mobile units first. Because your army is nice and compact, you can easily destray his units which will come in little groups... AFTER that u can take care of the infantery rock, or just leave them and go for his harvs/base.. I remember way back a guy sdeg or something, and in the beginning of the game he starts attacking your harvs with 10 dust scouts. My first reaction was: darn, i have to save my harv, let me send some buzz (which were killed instantly). Later i knew what he was doing and typed: hehe, plz don't kill my harv with your dusties :D, and left him there what he was doing. He the just retreited his units, cause he knew the provocation did not work ;)