looking up at the sky and watching the clouds - they change so much and so quickly, you don't really notice until you look really closely at the details
watching the full moon rise at sunset
seeing the new crescent moon for the first time after the dark of the moon, when you haven't glimpsed her for days
singing loudly while driving
cadbury chocolate with clinker pieces in it
getting up really early in the morning just to appreciate going back to bed
colouring in children's colouring books - and not judging yourself when you colour outside the lines
scribbling with crayons
lying on your back on the grass with your eyes closed and arms spread out trying to feel the movement of the earth spinning
going to a Dusk shop and sniffing all the scented candles - and walking out without buying anything
buying a magazine or book on a subject that you normally wouldn't buy
trying on expensive perfume at the most up-market shop you can find
trying on men's aftershave/perfume (it makes me feel sexy! LOL)
watching shadows dance on tree leaves
smiling at an elderly person you see at the shops or in public
getting a book off your bookshelf that you haven't read in years and re-reading it to see if you notice anything more/different
watching an old black and white movie - no sex, no swearing, no violence and happy endings!
standing in the sun and really focusing on how good it feels against your skin
finding shapes and pictures in the clouds
looking at the stars and noticing how they twinkle like christmas lights - and you'll see a shooting star too, they're more common than people think
writing a list of things you've learnt about a certain subject or just life in general
writing a list of questions you've always wondered about the world/universe/science, etc and putting it by the computer so when you're bored or need distracting you can look up the answers (eg: why is the sky blue? who the hell WAS this Freud guy? how do they make dog food? (not recommended...))
cleaning out that 'junk drawer' you've avoided looking at - seriously, cleaning sucks, but when you're finished it feels really good
finding a patch of moss/clover/etc and making up a story in your head about the tiny fairies that live there
getting binoculars/a telescope and looking at the moon, or going to a hill/lookout and looking at stuff with binoculars
download Google Earth and look at weird places or places you'd like to go - I've 'been to' the pyramids, the Mediterranean, Washington, Africa, Stonehenge, Greece, New Zealand, etc
try an ice cream flavour you normally wouldn't or haven't tried before