Liam and Alex, have a look with the search under thread titles "lean", "peak", and "LOP". There's a book worth of good info written by people who know there stuff. Look up John Deakin's "Pelican's Perch" columns and read each of them several times.
You won't be following many of the LOP techniques people like Deakin suggest since you're in a carberated aircraft without all cylinder EGT/CHT, but the general knowledge to be gained there is pure gold. I used to be afraid of red knobs
, but hours of reading has taught me that much of the damage blamed on "too lean" is rubbish. Its hard to know what to believe, instructors have told me things I know to be false, and there's so much that I don't know, but I've yet to hear anyone say that Deakin is mistaken about something!
The Lycoming info is, I feel, pitched in a less helpful way. The LOPers and Lycoming pretty much say the same thing, but Deakin's columns have much greater detail and less fear mongering. Rather than just "Rich is cooler so just do that OK?", there's a breakdown of what exactly is actually happening inside the engine.