1. Problem: Most recently, our house has been too cold for our yeast to be effective.
The solution: (thanks Tim!) is to preheat the oven to 200 while putting the dough together. As soon as it preheats, turn it off and give it a few minutes before putting your dough (in its bowl) into the oven.
2. Problem: A recipe calls for white wine to deglaze the pan, but you don't necessarily want to drink the rest of the bottle (or can't afford a bottle of wine every time for a few tablespoons).
Solution: Vermouth has a long shelf life if kept in the fridge, and should be watered down some so as not to be too strong a flavor in the recipe.
3. Problem: Buttermilk, who remembers to buy that?!? It's not like I'm doing to run to the store before breakfast.
Solution: Add a little lemon juice or vinegar to milk and let sit for a few minutes (while you combine the dry ingredients).
4. Problem: Bland pasta noodles, boiled potatoes, etc.
Solution: Salt the water A LOT! This is the only chance you really have to add seasoning to the starch, so the water should be really salty. Warning: This does not apply to rice. The water should only have a little salt for rice as the rice absorbs all of the water.
5. Problem: Your produce rots before you get to use it.
Solution (s): Buy some produce with a long shelf life (cabbage, bell peppers, sweet potatoes, etc), and use the more tender items first. Also, certain foods need to be in bags to last well (carrots, for example). Others can be loose in the veggie bins with no ill effect. Also, bananas and apples placed next to one another on a the counter will ripen more quickly, so don't put them in the same fruit bowl. The same is true of potatoes and onions.
6. Problem: Your grocery bill is more than you can afford.
Solution: Plan your meals, and stick to a list! We have a weekly meal plan now that included 1 night of beef or pork, one night for beans, one for eggs, one for homemade pizza, and one for chicken or fish. This is based on the "main protein" and we have many recipes for each of these proteins. I allow for 2 nights of leftovers each week.
That's all I can think of for now. I'm sure there will be more later.