Children's Week starts on Saturday and a few of the achievements require some items that the lazy or unprepared will be after, bringing a lot of options for obtaining gold.
The "Bad Example" achievement requires eating a copious amount of sweets in front of your orphan.
Delicious Chocolate Cake can only be made by a chef lucky enough to have had the recipe drop in their satchel of goodies after completing the cooking daily. If you haven't gotten the recipe yourself, now is the time to make friends with someone who has. The materials will also be good sellers, especially with the Darkmoon Faire falling in the same week; Mageroyal is commonly used for Rogues Decks for the Insane! achievement so now is the time to farm or scour the AH. Small Eggs can be farmed relatively easily by making a loop around the quarry in SE Loch Modan, but the lazy are, well, lazy.
Slice of Lovely Cake can only be created by purchasing a Lovely Cake, which provides 5 slices. At 18g for the whole cake, those who only want a slice will be willing to pay for only that slice.
Tasty Cupcake are also created by chefs. The recipe is a BoP world drop with a relatively high drop rate, thus is more readily available than the Delicious Chocolate Cake. However, these will likely sell as will the Northern Eggs needed to make them.
There are other vendor-sold items that you may be able to convince a lazy person to buy from the AH, but in general I tend to shy away from them. Options include Tigule and Foror's Strawberry Ice Cream, Flask of Port, and Northern Spices. When the ice cream was only available in Shimmering Flats, I'd say profit could have been readily made because getting there is a pita, but now that vendors appear in the two main cities, I wouldn't bother.
Mages, those needing portals to get around will possibly increase so be prepared for an influx of whispers. Always charge a fee, don't work for tips.
Those who have multi-person mounts can offer to chauffeur folks to the locations needed for a fee. This would likely work best for lower-level individuals doing the Vanilla quest, especially if you are a mage and can combine with portals to Theramore/SW/IF.
Best of luck!