Good news everyone! You are finally old enough to use a “cheat sheet” legitimately. In fact, it is one of the secrets of successful genealogists because genealogy is an “open book” test. You can’t store all the necessary information in your head, so knowing where to look for that information really differentiates the pros from the amateurs.
It is essential that you begin to create your own cheat sheets for the localities you research the most, and also for general research topics.
Family Tree Magazine has developed some handy cheat sheets for general topics and they are free.
Click this link for access to these quick reference guides. You will first need to sign up for a free account and sign in to access the free resources. Here are some snippets from several cheat sheets. I like this timeline of naturalization laws:

This war service reference guide will help you know which military conflicts your ancestor might have been a part of:

This source checklist comes in handy:

There are plenty more on Family Tree Magazine’s website, so check them out. Create a link to them in your digital genealogy toolkit, and add printouts to your reference binder, Cheater 😉
For links to this and other handy genealogy tools, click on Dayna’s Genealogy Toolkit on the menu bar above.