I first girl I had a serious relationship who wore this one lotion on her hands all the time. I would just melt when I smelt it and as it would end up on own hands a lot I would look like an idiot in class when I would sniff my hands and they smelt like her. No idea what it was, but to this day if I smell it, I think of her.
I love the smell after rain, and the feeling of a nice fall drizzle standing outside in a sweater. I like laying in my bed on a late night, going to sleep as it starts to rain lightly and the pitter patter on my tin roof.
The smell of baking bread.
I keep a few MP3s and MIDI files of old video game music(mostly 8 and 16 bit, but some 32 bit games as well) that I listen to when in a bad mood(or not) and always remind me of my youth and playing games with my step-dad, playing outside, fishing, all that stuff from a single song.
The feeling of a cold pillow and clean sheets. Nothing can beat that. I wish there was someway my pillow could constantly stay cool, I switch it around so much when I have a bad case of insomnia.
Waking up and feeling fantastic and ready for the day, that happens like twice a year, but I love it.