I've posted in a couple other comments in this thread, but all together:

Dewalt Gyroscopic Screwdriver. Not really necessary if you do one or two laptops a day, but very nice to have when you starting doing 10+ per day.

Metal Spudger Set

Klein Scout Pro 3 Network Tester

I've also gotten plenty of use out of the Klein Tools Electronics Screwdriver and Regular Screwdriver sets.

I'm sure any kind of cat6 cable cutter is fine, but I happen to like this one.

For non-standard tools:

For anything besides a cat5/6 sheath, or to cut zip-ties, I have used these wire strippers for many years - still sharp.

When you just need to chop something in half: Knipex Cutters. I've also found them quite useful for modifying Chromebook cases that aren't meant of the model they've been put on.

Optical Power Meter, also an RJ-45 coupler and a long patch cord, that way you can go and sit in comfort somewhere while consoled up to switch. Others have mentioned this too but also a good VFL (visual fault locator) if you work with fiber. Make your company pay for these things unless you’re like me and want to take tools with you to the next job, and you do work on the side.

https://www.aflglobal.com/Products/Test-and-Inspection/Optical-Loss-Testing/Optical-Power-Meters/OPM4-and-OPM5-Optical-Power-Meters.aspx

Edit: Adding Snips! Learn how to hold and use them.

Klein Tools 21010-6-SEN Free Fall Snip, Carbon Steel https://www.amazon.com/dp/B00HAN2RRY/ref=cm_sw_r_cp_api_glt_fabc_SY2N7FM7W3FV5VXD32V3?_encoding=UTF8&psc=1

Fluke Networks MT-8200-60-KIT IntelliTone Pro 200 Toner and Probe Kit, IntelliTone Probe and Toner Kit https://www.amazon.com/dp/B00N2S6RPY/ref=cm_sw_r_cp_api_glt_fabc_BD400BK8ZZEQ8NQXGCST

Also Klein makes great tools I carry the following screw drivers: 11-1, a flat head, and a micro 4-1 (all non ratcheting)

Klein Tools 32500 Multi-Bit Screwdriver / Nut Driver 11-in-1 Multi Tool, 8 Industrial Strength Bits, 3 Nut Driver Sizes, Cushion Grip Handle https://www.amazon.com/dp/B0015SBILG/ref=cm_sw_r_cp_api_glt_fabc_C8JX8H7RSA1RAPZ2X0H7

Precision Screwdriver Set, 4-in-1 Electronics Screwdriver with Industrial Strength Phillips and Slotted Bits https://www.amazon.com/dp/B01EOY7LTA/ref=cm_sw_r_cp_api_glt_fabc_TXPYFR74Q7CKJDJTJJGJ

Fluke Networks MT-8200-60-KIT IntelliTone Pro 200 Toner and Probe Kit, IntelliTone Probe and Toner Kit https://www.amazon.com/dp/B00N2S6RPY/ref=cm_sw_r_cp_api_glt_fabc_BD400BK8ZZEQ8NQXGCST

I would add a few things:

• Flush Cuts

• Electrician's Scissors

• This awesome little screwdriver

• A good quality multimeter (type will depend on what you find yourself actually doing)