Useful tips

Overclock
How to overclock your device. For SDE only.
 
First please download and extract https://hotfile.com/dl/152251241/ef2...cs_oc.zip.html
Then follow the instructions in my second post to push to your device then copy zImage and initramfs.
After you have successfully booted download SetCPU or No-Frills CPU Control and overclock to your desire. Thanks to surdu for making this happen! Visit his original thread HERE to view all warnings.

Howto take a screenshot
ICS has a built-in screenshot feature. No need to download any app!
 

Step 1: On the screen you wish to capture, press and hold the power button and volume down button simultaneously for a few seconds until the screen flashes and you hear a shutter. Be sure to press them at the same time
Step 2: You can find the saved screenshots in storage > Pictures > Screenshots
Step 3: Alternately, you can simply find them in the folder labeled "Screenshots" in the gallery.

Touchscreen issues
If you have touch related issues/errors, try the following:
 

Step 1: Turn your device off
Step 2: Carefully wipe down the screen with a dry or lightly damp rag. If you use a lightly damp rag, be sure to dry it with a dry one quickly.
Step 3: Power on your device
Step 4: Go to Settings > Repair & formatting > Touch screen calibration > *Put your device down on a flat, hard surface like a table, tap Calibrate the Touch Screen ONCE, then DO NOT TOUCH.
Step 5: Once finished, you can return to your launcher or wherever you wish

Multiple Users
More than one person uses your Archos?
 
Either designate home screens using a contact widget, or use a note widget in launchers like GO Launcher. There are also apps that support multiple profiles for root users like SwitchMe Root Profile Manager, however I can not guarantee this will work.

Multi-boot!

Removeable System apps
System apps you can safely disable (new ICS feature) or delete via Titanium Backup or other root app: (only remove the ones you don't use)
 
Archos Connect
Archos Remote Control
Media Center
Media Server
Movie Studio
Online Registration
Photo Frame
Talk Back
User Manual


If you have any tips I should add, or if any part of this guide is inaccurate or outdated, please let me know!

BIG THANKS:
Android Development Team for giving us awesome Honeycomb and Ice Cream Sandwich OS!
Archos for their hardware and awesome customer support!
serdu_petru for full root and all his hard work putting together these rooted firmwares so quickly!
letama for his original work on this device and work with kernels for overclock!
gen_scheisskopf for his work on allowing root access for HDD models!
Quinny899 for putting together his easy root guide for noobs like me!
Any other wonderful people involved in the development and advancement of this wonderful device!

GUIDE TBC
LG Nexus 4 (16GB)
Rom: CM10.1 Nightlies

Asus Nexus 7 (8GB)
Rom: CM10.1 Nightlies

HTC Droid Incredible - MP3 Player/Offline Device
Rom: CM10.1 Nightlies (Unofficial)

--Previous Devices--
HTC MyTouch 3G, Archos 80 G9