I play RA2 and Generals. With RA2, first I gather as much money as I can, then build an impenetrable base defense. I use air attacks and strike teams sent via Chronosphere to take out their Construction Yard, throw in a Lightning Storm/Nuclear Missile/Psychic Dominator to throw their forces into disarray, then use the resulting confusion to wipe out their major buildings with a gigantic ground invasion. After they sell the rest of their stuff to get troops, I let them die from my base defense, then send out planes to take out their Miners to finish the game.
With Generals, I enjoy air/superweapon assault. I use snipers/mircowave tanks to take out aerial defense, then let loose with my air general bonuses (Specter gunship and Mother of all Bombs being my favorite), while I paint the targets for my Raptors, Comanches, and Auroras.
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"Yeah, so this one time, I tried playing poker with tarot cards... got a full house, and about four people died." ~ Unknown comedian
Happy New Year from WP's resident fortune-teller! May the cards be ever in your favor.