Scaling Holograms

Do /blockdata and set the coordinates on the hologram. Modifying the "scale" tag should allow you to change the size of the hologram

Changing the particle Effect of a floor grating

If you do /blockdata, you can You can change the particle effect which comes out of a floor grate by changing it's ID in the block NBT Data (1.8)

Solid Holograms

Rename the Hologram on an anvil: "< Name of player  >:1"

Scaling Tardises

Place a Tardis at your feet and type /blockdata ~ ~ ~ {scale: < number of your choice >.< number of your choice >f}

Changing the Particle coming from the floor grates

Stand on the plate and do "/blockdata ~ ~ ~ {pid:< id of your choice >)}"

Skinpacks

Pressing the P button will activate it

Delorean

Doing  "/summon thedalekmod.DMDelorean" will summon the Deleorean. Unlike the 1.7.10 Dalek Mod Delorean, this one actually has functionality. More info here.

Blowing up Pigs with Sonic Screwdrivers

Defusing Nitro-9

Detonated Nitro-9 can be diffused before it explodes by sonic-ing it.

"Story Mode" (Mob)

Using commands, a story mode Mob can be spawned. This mob looks like a cow with Digeridoomen's face.

/summon thedalekmod.DMStoryMode

"Story Mode" (Item)

This item is intended to be a joke item and can be found in the creative inventory. When held, the player takes the appearance of a cow and occasionally makes cow noises.

User Specific Weapons

When using commands or TMI, you may notice many unusual weapons. These were made via Hire SWD and aren't able to be used by anyone except for those it was made for. Trying to will clear items from your inventory

Lightsaber (U46.1)

In the creative inventory, a Lightsaber weapon can be found. Since U46.2, the weapon has become DutchBear12's user-locked weapon and will clear any other player's inventory if held.

Title Screen Tardis view (Absent in the latest version)

In U45 of the 1.8 Dalek mod, pressing a certain keybind on the Title Screen would show the player a view of the Hellbent Interior

Toaster Item

Doing "/give thedalekmod:Toaster" will give the player a toaster item. Holding this item while in water will kill the player instantly, even in creative.

Big Boss Man ("Block John")

Doing "/summon thedalekmod.DMBLockJohn" spawns a rather unique boss mob.

"Aawtm"

Running the command "/playsound thedalekmod:dalek.mus.aawtm ~ ~ ~ 1 1" will play a great song which may be otherwise inaccessible currently.

Skinpacks

Pressing the P button will activate it

Christmas Advent 2013:

If you, like me, came a bit later you probably didn't know about the 2014 Advent calendar.

Usually, SWD puts everything in the mod that, well, is normally in the mod,  but in this version of the Dalek Mod, the Christmas Advent things had to be downloaded from UDWF1's videos. Notably, many of  these things never were ported and many weren't in the version itself. So, unless you knew or were informed, you may never have known about these things. There is a thread on it here link.

Shell and Mod Division References

 I forgot how I found these. I'll check and update this later

Notarocketlauncher

There is an item which looks like a credit but is actually a rocket launcher. You can find this using commands or TooManyItems. Presumably, it's the predecessor of the Black Box. Unlike the Black Box, however, anyone is allowed to use this

Glenn Miller (Saym face) is in the Sun on Gallifrey

Here's a video on it

Companion Naming

Rename a companion "johnjohn24" and killing it will play the Windows XP shutdown sound. Renaming a companion "UDWF1" and killing it will  spawn lots of sheep.

Dalek Mod Command window

At the time of writing this, the commands that can be used and how to open it are unknown

Giant Dalek

Renaming a Special Weapons Dalek "SWD" or "1WTC" in an early 1.7 build will make it giant

Statue of 1WTC dressed in John Lennons Sgt pepper outfit

Obtained with /give thedalekmod.SgtJohn

Weeping Angel Head Block

Obtained with /give thedalekmod.golfCart

Arcade Machine Block

Obtainment method unknown to threadmaker. 

Skinpacks

Pressing the P button will activate it

Delorean

Doing /summon Delorean will summon a Bessie Reskinned to look like the Deleorean. The Delorean only has its looks and does not time travel. 

Gravity Falls Cart

/summon DMGFCart

Minecraft Pocket Edition

Using some mods you can access Minecraft Pocket Edition

Notarocketlauncher

There is an item which looks like a credit but is actually a rocket launcher. You can find this using commands or TooManyItems. Presumably, it's the predecessor of the Black Box. Unlike the Black Box, however, anyone is allowed to use this

Dalek Mod Command window

Press the "P" button in game (or "O"). At the time of writing this, the commands are unknown.

Glenn Miller (Saym face) is in the Sun on Gallifrey

Here's a video on it

Companion Naming

Rename a companion "johnjohn24" and killing it will play the Windows XP shutdown sound. Renaming a companion "UDWF1" and killing it will  spawn lots of sheep.

Statue of 1WTC dressed in John Lennons Sgt pepper outfit

Obtained with /give thedalekmod.SgtJohn

Weeping Angel Head Block

Obtained with /give thedalekmod.golfCart

 Member Specific things

• 1WTC looks like Tinfoilbot from Roblox (1.7)
• When playing as 1WTC or RedDash16 if you shift click with the sonic it will display a list of all players on the server and there position, this was added in late 1.6 so John and John could locate Sams secret island on the old Dalek Mod Server (1.6+)
• There is an item in the 1.8 version of the mod called "Black Box" this is modeled after the Black Box from TF2 and can only be used by 1WTC, RedDash16 and Hughpugh (1.8)

PC Block (Version: "the development builds of 1.7")

• Obtained with /give thedalekmod.pc

 Dalek Mod Story Mode? (Version: ???)

• Up until recently old Modloader story mode files were left in the Dalek Mod assets directory