You could do what I originally did and write down every little thing in a notebook and try to follow that... but it gets difficult when you start using aircraft with lots of switches or with Multi-Functional Displays. So the best thing to use is Chuck's Guide to the various DCS planes.
His guides were extremely helpful to me when I start flying new planes or go back to one that I haven't flown in a while. Some of the guides are a bit old and might not hold fully to current iteration of the plane but the startup, radar, and weapons implementation are usually still faithful.
There are only 2 guides that I am aware of that have some small problem here or there. Those are the Viggen and the Mig-21bis guides. It's natural for the Viggen guide to be off simply because the plane is still in early access and things are going to change. I'm certain once the Viggen is complete Chuck will create a new guide that will reflect the completed state of the aircraft. The Mig-21bis guide is only off on one aspect: Landing. This is due to Eagle Dynamics changing how DCS World itself works while working up to version 2.5. I'm unsure why Magnitude has not kept up with the changes and updated the Mig-21 but they seem to be focusing entirely on either making a new module which they have not announced yet or they are still dealing with some internal strife left over from their split with Heatblur.
The landing part of the Mig-21 guide that is currently incorrect is easily corrected. On page 41 the guide states to be at 0-5 degrees angle of attack at touchdown. This is currently incorrect. Magnitude had posted a landing video, which I linked to in a previous post, where they say you need to be at 10 degrees angle of attack, as shown by the UUA dial, upon touchdown. That's the only problem for that guide. Everything else is still accurate and you're good to go.
Here's the video again:
I hope this has been useful to all of you. I know this is kind of a short post. Next time I'll be posting the video's that have helped me remember Basic Flight Maneuvers. This will be helpful in combat no matter what plane you chose... except maybe the helicopters. See you next time.