100 calories:

Portion control is hard to manage when we don't know exactly how much constitutes a 'portion'. Companies everywhere are marketing 100-calorie "snack packs" so you can mind your munching. Here's my tip: don't spend extra $$ on these individually packaged treats. Realistically you probably eat 2 or 3 anyway because you feel as though you're exhibiting some sort of self control (hello marketing ploy).

Instead, educate yourself on the calorie counts in your favorite snacks - be aware of your consumption, don't just trust what the package tells you.

Here are some beautiful guides:
It amazes me how much more you can eat for 100 calories when you choose fruits & veggies, see for yourself...

Calories in raw veggies:
http://www.fitsugar.com/Calories-Raw-Veggies-8500455

Calories in fresh fruit:
http://www.fitsugar.com/Calories-Fresh-Fruit-8500460

Calories in nuts:
http://www.fitsugar.com/Calories-Nuts-9436487

Calories in whole grains:
http://www.fitsugar.com/Calories-Whole-Grains-8545710

Challenge: count out 100 calories worth of your favorite healthy snacks, put them in ziplock baggies and confidently munch on them throughout the week.