When you stack up a bunch of miles or points, the last thing you want to do is let them expire. These charts from financial blog NerdWallet lay out the rules for 18 of the most popular cards.

Keeping an old car running instead of buying a new one isn’t always the best fiscal choice. When you look at ongoing costs and safety, a new car may be the better value.

Job interviews include all sorts of questions and scenarios. Instead of memorizing a script, try writing (but not sending) your own letter of recommendation.

Places like Costco and Sam’s Club are great places to save money. However, some items don’t always turn out to be a bargain. Watch out for things that are perishable or are “loss-leaders” at grocery stores.

Grocery stores know it’s difficult to sell stuff that’s reaching it’s “Best By” or “Sell By” date. If you let a manager know something’s close to that date, that person is likely to give you a discount.

Sometimes you don’t have the time or patience for a recipe (or you just have some leftover ingredients). This chart shows you a simple formula to put together any slow cooker meal.

Applying for a job is often an impersonal process. You're just a name on a screen or a piece of paper. Letting the potential employer hear your voice might help you get the job.

A well-organized home screen is a thing of beauty. When you download a new app from Google Play, it adds an icon to your screen, destroying your work of art. A quick setting in the Google Play app solves that problem.

When you're booking a multi-night stay at a hotel, you probably book it as one reservation. If you book each night individually, you might get a better rate.

Mac: If you have a presentation, or just want to achieve Desktop Zero for a while, you can hide all your icons with a terminal command. HiddenMe skips the terminal and does it all from your menu bar.

Ginger is one of those ingredients that freezes really well. In fact, freezing ginger can make it easier to peel and grate. As an alternative, freeze it after you grate it for quicker meal prep.

Internships are a great way to get valuable experience. If you haven’t found a summer internship yet, this chart lists the best places to find them.

Every week, we share a number of downloads for all platforms to help you get things done. Here were the top downloads from this week.

For some people, restricted diets (like going gluten-free) are a choice. For others, it's a medical necessity. If you fall into the latter camp, some of those foods could be tax deductible.

Using a screen at night messes with your sleep, but let’s be honest: we all do it anyway. To lessen the problem, use the smallest screen possible.

A good morning routine starts your day out right, whether it’s making your bed or meditating. Highbrow sends you a short educational lesson each morning on a variety of subjects.

If you work for a large employer in town, local businesses might give you discounts. All you have to do is ask.

iOS: Apple's Safari makes it easy to view your open Safari tabs from your iPhone or iPad. That means others can see what you have open. If you want to close one of those tabs remotely, swipe to the right.

When you cook meat or fish, you should never reuse raw marinade. With tofu, though, the marinade doesn’t have the same health risks. Re-add the marinade to your dish at the end of cooking for more of the recipe’s flavor.

Carry-on policies go way beyond a simple “two-bag rule”. This chart shows you the detailed policies of 11 major US airlines.