When it comes to eyeliner, there is no one-size-fits-all method. The shape of your eyes will dictate how you should apply your liner for the best results. For example, if you have hooded eyes, you'll want to use a lighter hand with your liner, since a heavy hand can make your eyes look smaller. For almond-shaped eyes, the classic cat eye is always a good choice. And for those with round eyes, a thick line across the lid will help to make them look more elongated.
As for mascara, there are a few different formulas to choose from depending on your desired look. If you want something that will give you big, bold lashes, go for a volumizing mascara. If you're looking for something a bit more natural, try a lengthening mascara. And if you want to curl your lashes, look for a mascara with a curved brush.