the esd bands, it is nice to have them but in reallity, you can't use them if your house doesn't have propper grounding, which is the case of 90% of houses
work in a table, made of wood preferably, don't stand over a carpet and don't touch the contacts on the cpu and ram, also gpu and you should be fine
other tools i find useful to have is a small led light, so your smartphone acting like a led light is helpful
some pliers if the case is cheap will help you
a philis screwdriver, one with not that big head and one with a not that small head will be enough, also you could buy a screwdriver kit with bits like these...