I'll go ahead and say don't expect too much from me. Literally could not have come at a worse time. We have one computer in the whole house (excluding my work-issued Chromebook) and just last week has been shutting down for temperature reasons. I'm looking into an app for stats (I would like a free one if I can find a good one). But, overall, yeah, I gotta be sure I don't let it run too much. I'll keep chipping away here and there whenever I can though.
For monitoring temperatures, fan speeds, voltages, and power levels I use the free version of
HWmonitor. It's a nice stand alone program that you run whenever you want to monitor stuff and it goes away when you close it.
If you want a temperature display in the system tray a free one I use is
Core Temp, you can configure it lots of ways, but I have it start with the OS, minimize to the tray automatically, and display the temp of the hottest core. Hottest core does mean the number is constantly changing but it's a good indication if any part of the CPU is getting too hot.