Travel seems to boil down to two types: Luxury and budget. Since luxury travel lends itself to easily checking countless suitcases that will just sit nicely in your suite all vacation, I'll focus on budget travel. After several trips over the years and a recent 17 day Italy trip taken without checking a single bag, I've found the key to happy packing lies in these essentials:
OH! Before we get in to the packing tips DON'T FORGET TO DO THIS!: Check weather. Check itinerary & check dress codes. Have you heard the phrase "Don't work hard, work smart?" Same idea applies to packing. Only pack for what you have planned, not for what you may do....you probably won't end up doing it.

1. The generic Tank Top (in at least 3 colors)
If you don't already own 1 million like I do, head to your local "cheapy shop" and grab a handful.
They are inexpensive and can be used to easily change up a look or color scheme. They fold up into almost nothing, can be worn alone, underneath a sheer top, layered with each other, and are comfortable enough to serve as your pajama top.
2. Pants Pants Pants ...

3. Dresses

This should be a no-brainer but just in case I will remind you of the importance of a quality LBD. The one item that must make it's way into your bag for a nice dinner or a
night of drinks and dancing should be a classic, comfortable & stylish little black dress. Any colorful accessory, belt or jewelry will instantly change the look. Depending on the weather and the length of your trip I would also recommend a cotton maxi dress in a bright color. Just make sure it is also in a solid color so you can easily accessorize this dress differently as well.
4. Ugh, Shoes.
The basic ABC's of shoes are: Athletic shoe, Boots & Classic wedges (or your most trustworthy, classic black heels.) Feel free to get creative with this combo and definitely feel free subtract, but just

Pack shoes first and line them along the bottom perimeter of your suitcase. Don't forget to stuff your shoes with socks, scarfs, phone chargers and even jewelry to save space!
5. Toiletries & Accessories

As far as accessories go, this is your time to shine. Go crazy....(within reason!) Rings! Statement necklaces! Earrings! Oh my! But who is the queen of all accessories you ask? The scarf! Pack a few!
They are not only functional but quickly change the look of an outfit and can double as your beach coverup.
Now that you have packed the essentials feel free to fill in the holes with trendier tops and a few extras you have room for. Make sure you take a large neutral tote as your "personal item" its will easily carry your make up bag, iPad and can be used as your everyday bag as well as a beach bag if needed.
I know these tips seem obvious but we all know packing will bring out the hoarder in all of us! Stick to the basics and you shall emerge victorious in the battle of fashionable travel.