1. Doing facial exercises will tone my facial muscles, and make me look younger.
Doing facial exercises can actually stretch skin and cause more lines and wrinkles. Whether you realize it or not, the face is the one area of the body where muscles connect directly to the skin - there are no ligaments or other tissue padding in between. Your constant smile over time creates "laugh lines" (with the help of gravity) and so, similarly, any repetitive facial exercises can do the same. Daily facial maneuvers and manipulations can cause lines, furrows and sagging.

2. Getting tan helps to clear up my acne
There is a theory that UV light can decrease skin's bacteria but getting direct rays from the sun is not the safe way to do it. You can of course create tanned skin which may camouflage your acne but at the risk (strong risk) of encouraging skin cancer. Talk to a dermatologist about the safer options to treat your acne effectively. Getting a tan is not a viable approach.

3. Scrubbing my face twice a day with soap and water will keep my skin acne-free
You do want to get the day's grime and makeup of your face but you do not want to ruthlessly scrub your face clean. Gentle massage with either a cleanser that has small exfoliating beads or using a soft washcloth to remove the surface debris is the best way to clean your face. If you wear mascara, remove gently with a product specifically formulated to remove mascara. You can also use an alpha-hydroxy acid lotion to help remove surface dead cells and to stimulate cell turnover.

4. Wrinkle creams can erase wrinkles
Those ads make all kinds of promises but in most cases the temporary plumping results are due to the humectants and moisturizing ingredients that can hydrate skin, making lines less visible. To change the texture of skin dramatically or to erase wrinkles significantly, you would need to invest in laser or surgical options. Fillers like Restylane can fill lines, but you do need to have the process redone a couple to several times a year. Botox can prevent wrinkles and also create more of a seamless look by paralyzing certain facial muscles. Botox can last 3-6 months.  current skin care research is looking at ways to encapsulate active ingredients like hylaronic acid into nano particles so that they penetrate deeper into the skin.  The best topical options are Vitamin A creams that can help to increase cell turnover and promote collagen formation.

5. If you squeeze the pus out of a pimple early on, it will clear quickly
If you think you got all the pus out, think again. In most cases you've actually pushed the pus and debris deeper down into your skin. That can lead to more inflammation which can spread and ultimately create scars when it does heal. You can buy a comedone extractor. It allows you to apply firm pressure to the area and then roll it across the pimple to express the pus.

6. Shaving your legs makes the hair grow back faster