Nothing of too much consequence. The ep began with a look around winterized Springfield (Groundskeeper Willie attacking an Ice Age Squirrel look alike and then getting attacked by more squirrels, Lindsay Nagele cleaning her car off, blah blah) as Homer reawakens from being under some snow. Knowing he was drunk last night but not sure what happened, he returns home to find no one there and Santa's Little Helper growling at him. He then goes to Moe as Moe explains his forget me not drink with the video. You probably saw the rest of it.
Okay this one I really have to disagree with. They shovel the Family down in our throat so much that I'm glad there is actually an act that didn't need to go by without much Marge, Bart or Lisa scenes. Really I know it's the Simpsons but with 400+ episodes you really don't need them crammed down every other scene so much. In fact I felt the kids helping in the dream world was kind of an excuse to have them in the episode in a sense so guess we just have conflicting views on overused characters and all.
Starting? They've been doing it since at least "Homer The Moe'. This would only be one those stoen jokes (though I feel this one is only partially stolen in a sense since FG and Simpsons did do different takes with it).
Okay, I'll give this credit for being a sort of interesting look at the Homer/Marge relationship. The idea of Marge actually cheating on Homer involving some domestic dispute and the family not being around is actually something they haven't really tried before (well at least on the "look at this black eye but my husband didn't do that" sort of thing anyway) so it should get credit for that. As well as at least finding a way to tie all the loose ends together (though not really too tightly writtened. I mean Duffman's phrasing about what he said to Marge and Homer's reasoning for having the bounce pad on the pool for the party were pretty contrived even for the Simpsons) with how the story played out. And even though I never saw "Eternal Sunshine Of The Spotless Mind" but the title and butterflies make it too obvious a refrence to ignore and it ties into the plot decently. Plus there were some pretty good gags in this one (The scratish squirrel that Wiley took down, Lindseay Nagele cleaning her car, Moe trying to find a pose of his in the video that "looks" like him, Homer knowing that Flanders called him in for the domestic disturbance, The memoreis of the old clientel at Frink's house, the flashback scenes during the trip (a good way of doing flashbacks IMHO. Showing the clips but not having a long scene inserted of them just to fill for time), Homer, Bart and Lisa enjoying sledding together (thinking about it I am glad they at least try and add more family moments to these eps then they have in the past), Figiment Bart beating up 10 year old and 20 year old Homer, Homer's life flashing before his eyes and Lenny and Carl telling Homer what they think of him that he wouldn't remember. There wasn't anything that great that stood out about this episode, even if it was a sort of out there Simpsons (not to mention I didn't really like Cheif Wiggum hitting himself into the door since that was a joke taken sort of from American Dad, nor Patty and Selma being so meanspirtied in trying to off Homer. I'm sure it would never pass if Homer tried the same to them but it's suppose to be funny when Homer's the victim and blah blah). One of the better of the season though which is actually having more decent eps ever since that abnoration of a few weeks ago was played. I think you know which one I mean.