Useful places to look

Lord of the Rings Online (LOTRO) sites

Fellowships - a very useful guide as to why grouping is a GREAT idea, and why your level doesn't matter!
Fellowship Manouevers - an extremely useful guide to the use of special manouevers in combat
Warcry - (A very useful site wih a LOT of information!)
Allakhazams - (another very useful site (even though I hate the ads!))
Ten Ton Hammer - always a good source of info
Lordoftheringsonline.net - (A nice fan-site of LOTRO)
LOTRO wiki - a wiki for LOTRO
LOTROCraft.com - A Crafting Wiki
LOTRO-Edge - A Lotro Guide & Forum Community