zlauncher - what tabs do (eg chat). what you need to know (eg refresh speed)

zrc - simple tips (eg auto-join list)

Navigating ZD Site - dmflags, blogs, lots of useful shit

Forums; some doom-related links (eg doomworld)

starter competitive configs (WASD and ESDF) - volumes tweaked, simple binds etc

How2Play: Duel - moving from spawn (eg d5m1/judas ledges), defensive/predictive projectile weapon usage.

How2Play: CTF - don't fucking spam rockets, cunts. fuck sake.

How2Play: Survival - patience and cautiousness, sharing pick-ups, rarely use the rocket launcher