Either tarot cards, consult zoltar, or the weather crystals in the pylon ...
Weather crystals in the pylon? I'm sure that reference was lost on about 90% of the people on the board LOL. Having grown up in the 70's watching Land of the Lost on Saturday mornings though it hit me squarely in my nostalgia bone .
As far as bombing, it's all about the theory that it is better to give than to receive. Major life events (weddings, graduations, birth of a child, death of a family member, surgery, personal tragedy, etc.) are all good reasons. Sometimes the victim is someone that you have a lot in common with. Sometimes you see that they are suffering and want to cheer them up. Sometimes you see that there is something they are dying to try and just decide to send them a treat. Do it openly, do it anonymously, do it once in a blue moon or once a day. Any way that you do it can be very fun and highly satisfying.
As far as getting addresses, the best way is to check your victim's trader rating and see who they have traded with recently. These people should have an address that they may be willing to share with you. If not, I (and many others) keep a spreadsheet with the addresses of people we have interacted with. Just ask around and you will find a way to become a mad bomber...:thumbsup: