You can make random things happen by behaving in random ways. Switch around your work schedule. Take two hour lunches and go driving to municipal parks you've never seen. Wear unmatched shoes, or at least unmatched socks. Wear one shoe and nothing else around your own house for an hour. Change your Monday evening plans at the last minute and randomly drop in on unexpecting friends. Don't buy your usual brand of ANYTHING at the store next time you go, try completely new things.
Next time you get in your car to go anywhere, even if you're late, just sit there for 3 full minutes. Don't start it, don't put in a CD, just sit there.
And always stop for yellow lights this week, and always run them next week, except when you'd endanger yourself to do so.
Turn left when you think you "should" turn right. Take the long way home.
Build a fire cannon. Find plans online for a "potato gun", but build it with metal parts, and put a sparkplug at the front and load it with gasoline instead of potatoes. Sell it on e-bay.
Go to Cheapo Disk an hour before they close and buy four super cheap CDs you've never heard of. Make it five.
And yeah, the unmatched shoe thing. Trust me on that one. If anyone asks why, tell them "It's all the rage in Milan" or "It's part of a top-secret experiment".