One important beginner’s tool for his electronics lab is the cheat sheet. This is a double sided A4 page with the main references for your daily electronics need. Here is the one that Clounce prepared and uses during his experiments.
Download your copy from my github repository. As described in the readme.md file in my repo, the images in the cheat sheet are not mine but taken from various sources available in the internet. I took the ones I use most and combined them in a double sided A4 page.
Print and enjoy!