Tip Number One: Don’t Overpack.
Tip #2: Plan Ahead.
This is the #1 remedy for over packing. Check the weather report before you leave. Don’t bring clothing you know won’t be suited to your destination’s climate. I like to plan my outfits in advance before I pack (though not to a compulsive degree) for a few reasons; not only does it ensure that I have all of the pieces I need AND prevent me from bringing needless items, it solves the cluttered suitcase issue I’d mentioned earlier. Oh, and for goodness sake, do not bring ten pairs of jeans. You know you don’t need them and you’ll only end up wearing your very favorite pairs anyway.
Tip #3: Think Staple Items
Tip #4: Reuse Accessories
Nothing will fill up your suitcase faster and push you over the checked-bag-weight-limit sooner than too many shoes. For a week long summertime vacation I pack the following shoes: 1 pair of cute and comfortable flats/slip ons (which I wear in the airport), 1 pair of sneakers, and 1 pair of versatile heels (typically wedges) that I can dress up or dress down for night time or day time.