Open the tuning.lua located in steam/SteamApps/common/dont_starve/data/scripts. with the Notepad. Here you'll be able to modify some availabe game data. Some useful items below.:

To allonger the time of fridge:set PERISH_FRIDGE_MULT = .5 .5 to a low number, such as .01

To slow the rot of seeds: set ERISH_SUPERSLOW = 40*total_day_time*perish_warp 40 to a higher number, such as 200.

To increase the maxhealth of Wilson: set local wilson_health = 150 150 to a higher number.

To increase the Dmg of Wilson: set local wilson_attack = 34 34 to a higher number.

To increase the movement speed of Wilson: set WILSON_WALK_SPEED = 4, & WILSON_RUN_SPEED = 6, 4&6 to a higher number.

To allonger the time of freezing and starve:
set FREEZING_KILL_TIME = 120,
STARVE_KILL_TIME = 120,
to a higher number to. Such as 1200/1200

To increase the accumulation of a square:
set STACK_SIZE_LARGEITEM = 10,
STACK_SIZE_MEDITEM = 20,
STACK_SIZE_SMALLITEM = 40,
to a higher number.

To increase the weapon dmg:

NARMED_DAMAGE = 10, HAND
NIGHTSWORD_DAMAGE = wilson_attack*2, 暗影
SPIKE_DAMAGE = wilson_attack*1.5, 狼牙棒
HAMBAT_DAMAGE = wilson_attack, 火腿棍棒
SPEAR_DAMAGE = wilson_attack, 矛
AXE_DAMAGE = wilson_attack*.8, 斧头
PICK_DAMAGE = wilson_attack*.8, 镐
BOOMERANG_DAMAGE = wilson_attack*.8, 回旋镖
TORCH_DAMAGE = wilson_attack*.5, 火炬
HAMMER_DAMAGE = wilson_attack*.5, 锤
SHOVEL_DAMAGE = wilson_attack*.5, 铲子
PITCHFORK_DAMAGE = wilson_attack*.5, 草叉
BUGNET_DAMAGE = wilson_attack*.125, 捕虫网
FISHINGROD_DAMAGE = wilson_attack*.125, 鱼杆
UMBRELLA_DAMAGE = wilson_attack*.5, 雨伞
CANE_DAMAGE = wilson_attack*1.5, 手杖
PIPE_DART_DAMAGE = 100, 吹箭
change the number to a higher