Here we can share the small tips and tricks, not big enough to fill a whole page but relevant to others.

My /datadata gets full, what to do?

• set sync for gmail to ea 4 days, 30 is standard but fills /datadata quickly
• move big app to sdcard. Games! 
• create an empty file ".nodatadata" in /datadata with ea RootExplorer and reboot. Everything will be moved to /data/data by the rom. Only way to revert this is a factory reset. It will slow down your phone.
• Another option is to use this script. Instead of moving the whole of /datadata to /data (and so introducing lag) it keeps performance critical sqlite databases and xml preference files on /datadata and moves everything else to /data: [SCRIPT]NEW "Low Storage" Notification fix

I hate MTP, I want mass_storage!

• Run this command in adb shell or with terminal explorer and reboot:
• "setprop persist.sys.usb.config mass_storage,adb"     <- enables mass storage.
• "setprop persist.sys.usb.config mtp,adb"                   <- reverts to mtp.
• Or use this miniature app to do the same: USB mode switch for SGS1 on CM by Zatta.

Why do I have to press nonononononononoYESnono in recovery to flash a zip? That sucks!

• You don't!! Just create the file ".no_confirm" in /sdcard/clockworkmod and save your volume buttons.

My wifi hotspot won't work, am I doing something wrong?

Probably, there is a trick/workaround reported at xda:

• Before turning wifi hotspot on, wifi must not be active.
• If wifi is inactive, then turning wifi hotspot on will succeed.
• However, if you try to turn wifi hotspot while wifi is active, then it will fail.
• And it will keep failing, even if you turn wifi off and try again.
• It will succeed after a reboot.