Quick post as I am not able to upload any pictures to my computer right now.
1. Concealer first...or foundation? If your concealer is dry, put it UNDERNEATH your foundation. If your concealer is creamy put it OVER your foundation. If your concealer is creamy and you try to put it underneath your foundation, it will ruin the concealer, but if you put a dry formula on top, it can make it look very uneven, just from the texture.
2. When picking out lip colors, pay attention to the undertones. Look up swatches online, especially if you have a budget and cannot try it in stores (drugstore). It will save you a lot of money.
3. Make sure you follow peoples blog or subscribe to people on YouTube that have your skin type. You don't have to watch them exclusively, but products will more likely work for you if your skin type is similar.
4. After you use a nail polish remover, wash your hands thoroughly, and apply a good lotion. Nail polish remover can damage the skin on your fingers, and you need to get it off as soon as possible. Then make sure you moisturize.