always use third-person to check around corners before going out of cades or use a flashbang and a grenade.
use phase jumping instead of normal phasing to get in and out of cades quickly.
make sure you're good at tau/wicked/boomstick jumping, this is a must-have skill that's both useful and fun.
never buy guns in the worth menu only spend your worth on traits. a few must-haves are vamp, cannibal, steadied footing, quick, and surged
have a loadout made for every situation - Barricader, medic, gunner, melee, melee berserker, boomstick, tau jumping etc
when you're running around make sure you have a boomstick and a melee ( t4+ )
upgrade your jump, speed, and health cards.
get good at cading
don't be stupid and never take any unnecessary risks