1. easiest way to kill deathclaws - jump on a car - just move around and jump on the roof of the car constantly, so it doesn't reach you and keep firing. otherwise i wouldn't stand a chance
2. power up devices with generators, but don't forget to pull the wire from one to another with SPACE (simple, but got frustrated with this one)
3. upgrade lockpicking and hacking skills to lvl3 asap, you'll find lots of stashes/doors
4. leave all junk in workbenches, there's a button to store all the junk stuff at once

please add useful info below.

p.s.

i have some issues with completing old guns quest, where i need to blow the tunnel. marker is set on the workbench, but i don;t know what to build there. any advice? thx

Dont get into a fight with a deathclaw on survivor also on survivor healing items heal over time.