Skincare routine is the perfect DIY project where you can't really go wrong. Ok, when you include the common sense and don't go against the reason.
You know, the normal:
leave your eyes undisturbed,
avoid things you are allergic to,
no use of things you don't want to eat,...
If this sounds new to you, then skip experimenting to professional and stick to the millions of skincare products out there. If you are with me on this one tell me what is your favorite go to trick, the simplest and easiest possible? My laziest day care includes nothing else but the top layer of homemade kefir and a sponge. I love the slow movement of the soaked sponge and application of goodies all over my face before the shower.