"People think they're being healthy eating this, when sometimes they're having the equivalent of a cake as they're high in sugar and fat," she says.
A medium latte (about 360ml) with full-cream milk can contain more than 800kJ and if you add cream that's 300kJ more.
Having three to four of these coffees daily and this can seriously increase your energy intake. Worse still is these caffeine fixes do not fill you up. Wall recommends opting for one daily skim milk coffee as a substitute.
And don't get Wall started on those chilled frappuccinos. There's at least 1000kJ in these and some may have as many as 1900kJ.
As for alcohol, Wall says a 200ml glass of wine contains more than 800kJ and a beer has approximately 650kJ. These are "empty kilojoules" because they have no nutrients.
"A bottle of wine is the equivalent to eating the same energy as a family-size block of chocolate," she says.
Alcohol also increases your appetite - it can cause your blood sugar to drop, which makes you hungry.
"It's easy to pile on the weight having those sugary drinks," she says.
Juices and smoothies are not always as good an option as many believe. Wall says it can take up to four oranges to make a glass of juice so you end up consuming a lot of fruit sugar in one hit.
When it comes to smoothies, Wall says "if you sat down and tried to eat all the components of a smoothie you probably wouldn't be able to" as many things - and consequently kilojoules - are loaded into the drinks. Instead, she recommends having a piece of fruit.
Other quick, healthy and portable snacks she recommends include a small sandwich with a salad filling, a reduced-fat yoghurt, dried fruit or raw nuts. If you prefer the taste of roasted nuts, make your own. That way you can control the amount of oil and salt.
Weight Watchers' food and nutrition manager Nour Nazha recommends eating a healthy and balanced diet and says a big key to managing weight is controlling the options and portion sizes.
Many foods and drinks contain hidden kilojoules. For example, a 375ml can of coke has about a 14 teaspoons of sugar.
She recommends thinking of alternatives for energy-laden foods.
For example, having a spinach and cheese muffin plus a skinny cappuccino is the equivalent to just one caramel mocha drink with cream.
Meanwhile, a skinny cappuccino has a quarter of the the mocha's kilojoules. A medium chocolate muffin has roughly 1550kJ, so it would be better to swap this for a nut bar as it has less sugar, better fats and protein.
If you want to satisfy a sweet craving, try two fresh dates.
Auckland gym owner, Scott Cottier, says many people don't realise how much exercise is required to burn off the kilojoules in some food and drinks.
For example, it would take about 15-20-minutes of "vigorous exercise" to burn off one pint of beer. But he adds if you exercise more, you can eat more too.
Ultimately, he says live life with some balance. Make healthy choices 80 per cent of the time and then have some treats.
• Information in panel supplied by Weight Watchers. This year, the Weight Watchers ProPoints® plan has a fresh, new approach and an extensive list of recipes and meal ideas tailored to individual food preferences, from gluten to lactose free, Mediterranean to vegetarian and filling and healthy options.
