While the stock configuration of the Sidewinder X2 were pretty solid there are some relatively cheap upgrades that I could implement.
Octoprint
Sick of pulling out,slicing the model, exporting the print file and plugging in your USB stick over and over again? Got a spare Raspberry Pi gathering dust? Why not install Octoprint on it and control your printer via network and a webgui?
Octoprint lets you do this and more with a variety of settings and plugins like creating timelapses of your prints.
Camera Mount
A front mountable camera mount that you can print yourself. I have it set up with a logitech C920 that I used for Microsoft Teams on my computer.
Extruder Lever Brace
Not 100% sure if this actually improves something but it didnt hurt my prints (so far). Printed in PLA, reprinting it in PETG if I get an all metal drive (maybe).
For an in depth upgrade guide for the Sidewinder X2 check out 3DPrintBeginner!
Calibration
Now that I have set up my printer how I like, I want to hone in all the various settings to get clean prints consistently.
Luckily Teaching Tech has a very thorough calibration guide hosted on https://teachingtechyt.github.io/calibration.html and if you use Cura there is the Calibration Shapes Plugin to generate the shapes and scripts for calibrating your 3D printer.
I am still working through the guide myself but so far I have noticed an improvement and I have learned a lot about my 3D printer.