A lot isn't necessarily best. You really may not need 12-15 products to get great looking skin. You'll need a good cleanser, of course, or a cleanser with good break-out treatment - but avoid stripping all the natural oils from your face, too. An OTC cleanser is almost always a good starting place. Take care to use products recommended for the adult user. The reason is teen products are heavy duty, and they may be too harsh for your adult facial skin.
So find out your skin type, then simply provide what your unique situation needs. Some require all three: toner, cleanser, and moisturizer. Some common reactions include experiencing break-outs when toners are used, or feeling itchy and heavy with a moisturizer. And then there are some who only need to use a cleanser! Others need all three products as well as special products for problem areas. If you only use a cleanser but still have nagging break-outs, then maybe try a good spot treatment in addition to the cleanser before bed.
Creating a simple log of the products used and the results of each is a simple way of tracking the suitability of each. Keep these records in a notebook or on your computer. You will soon realize that this method will save you lots of time and money because you are consciously searching and recording the results. Knowing what you have tried and how good it works is probably your best ally. Best of all you will be able to connect the dots and create skin care routines that match your needs. If most moisturizers make you break out, you might consider not using a moisturizer anymore. If something burns your skin, then it is time to figure out what it is about the product that irritates you and steer clear of it in the future.
It's not all that hard to determine how good a product is for your skin. Don't be afraid to experiment with your skin care. If you keep trying, you will find the perfect skin care products you can count on.