It seems like life and wellness gurus are always telling us to do more of this, or less of that. Exercise more, drink plenty of water, sleep more, stress less, eat this-not that. While these things are all good in theory, all that advice can be tough to follow. Or, to keep the seemingly endless guidelines straight. We’ve compiled a lifestyle edition of some of the top things you should be doing to promote a healthy and happy you, and just how much (and how often) you should be doing them.

Drinking Water

Alright, so we’re pretty much always hearing “drink more water”. Yes, proper hydration is important for health, and even beauty. But, how much you should drink a day depends on quite a few factors. Ruling out it being a brutally hot day and your needing more water than usual, things like your age, gender, and even weight can determine your recommended daily water intake. Women actually need less water a day than men, with 2.7 liters being the general rule of thumb. But, age also plays a role. Those over 19 should drink around 9 cups, or 95 oz. For those aged 14-18, you’ll need between 64-88 oz.

Changing Your Toothbrush

This one is a biggie, and it may be one you’ve been neglecting. Sometimes you just plain forget that it’s time to change your toothbrush. The bristles might still look great and you might not see a need for a new one. But, toothbrushes are total magnets for germs. Most dentists agree that you should be tossing the old one about every 3 months. But, if you’ve been sick, throw that sucker out immediately after. Using the same toothbrush you used while you were feeling ill can actually lead to reinfection.

Cardio

While some live for the gym, others of us look at exercise as a necessary evil at best. For our lifestyle edition piece though, we’re going to focus on the amount of cardio you should get for good health, rather than weight loss. The rule of thumb here is about 30 minutes most days of the week, generally speaking at least 5. However, it also depends on the kind of cardio you do. If you go for something a bit more intense like a HIT or spin class, you can cut that down to 3 times a week for 25 minutes.

Change Your Home’s Air Filters

Air conditioning is life. But, when was the last time your air filters were changed? If those filters don’t get changed, they will clog and jam with dust, pet hair, and other particles. This will lead to both a malfunctioning unit, as well as “dirty” air. This lifestyle edition entry also has a few factors to keep in mind. If you live alone, you only need to change the filter once every 6-12 months. However, if you have a pet of the furry sort, you should be changing out that bad boy every 60 days. More than one pet or suffer from allergies? Then, every 20-45 days is the standard.