A few things I'd like to add.
- Always Life Orb not LO
- Don't use "Scarfed/Banded/Specs <Pokemon>", use "Choice <Item> <Pokemon".
- The word "base" when used to refer to a stat is not capitalized ("Porygon-Z has base 135 Special Attack"), but when referring to power, is ("Explosion is Base 250 Power").
- When mentioning EV spreads in set descriptions, say the whole stat name ("Salamence usually invests 252 EVs in Speed", not "Salamence usually runs 252 Spe").
Otherwise, nice sticky, I'll come up with more as I come across common errors.