If you are anything like me, when you pack for a trip, you don't end up wearing more then half of the things you brought with you! At one point on every trip I wind up saying "What were you thinking?!" Well, I recently had to pack for a 3 week trip in 2 different destinations each with different weather.......so I stopped to really think about it before I packed. These are the 3 tricks I can up with to keep me from overpacking:

DO SOME RESEARCH BEFORE YOU LEAVE: Before you leave, get some idea about what the weather will be, what kind of activities you may be doing, what the dress codes are for places you have planned etc. Once you know what types of things you need to bring you can limit what you pull out to pack.
LAY EVERYTHING OUT TO MIX & MATCH: Clear off your bed and grab a glass of wine....it's time to create outfits! We do this for ourselves every day...now you just have to plan ahead. You don't need to wear something different every day! Choose only pieces that will work with others to create different outfits. ONE pair of formal shoes will do on most vacations! If you are going some place tropical, ONE "just in case I'm cold piece will do! Once you have it all laid out, leave the room for awhile and then come back to see if you can weed out any more.
LEAVE ROOM FOR SHOPPING: Yes I am serious! If you fill your luggage with too much leaving home.....you will have no room to bring back any goodies! It's a no brainer!

Wishing you all wonderful summer holidays! Please share any packing tips that you have.