Here are some of my own little tips (not filched from elsewhere).

They'll get added to as and when I can think of anything else from my vast experience.

I hope you find something useful or interesting.

Signed

Nobby No Friends.

12 string - guitar 5th tuning
Capos - staying in tune
Creative in standard tuning
Hammer off, get 2 notes
Order of guitar effects
Staying in tune after tuning
Tuning by ear to standard
Tunings

12 string - tuning confusion
Banjo mutes
Capos - banjo 5th string detachable
Changing strings and staying in tune
Cuts on playing fingers
Endless Choice
Fingernails - ping pong
Fingerpicks
Fretboards - dry
Guitar case accidents
Scratches - from belt buckles
Scratches - on plastic
String pegs - keep 'em down
Strings - boiling
Strings - cleaning clean
Strings - sticking in nut
Truss rod seasonal adjustment
Tuners

Click breakthrough
Click can help rals
Dropping in guitar with vocal
Mike pops - how to lose them
Pitching backing vocals
Recording acoustic instruments
String noise on recordings
Use of loops