Fortunately, as has already been mentioned, Tower of the Hand is an online resource of A Song of Ice and Fire that lets you set how far in the series you have read so that when you search it's database it, only displays information through that book. It defaults to having not read any of the books, so you won't accidentally stumble across spoilers. The Wheel of Time could benefit greatly from such a resource, but I don't know of one.

Also, as The Man suggested, the last few books absolutely are some of the best in the series. The bulk of what frustrated me through the series was conflict perpetuated almost exclusively by stubbornness and stupidity on behalf of the main characters. Most problems could have been overcome by Rand, Egwene, or Elayne just deciding to talk to someone and tell them what was up. Earlier in the series, this was excused by how far apart they often were, but by the time literally everyone discovers traveling, it's still going on when they could have breakfast in the Wastes, dinner in lunch in Andor, and dinner at the Tower. By the time Sanderson picked up the series, everything was beginning to come together. This frustrating lack of cooperation falls to the wayside so that things can get resolved, and the series is much better for it.