When acquiring socket sets, I purchased six point socket sets before twelve point socket sets, (you need both), because when taking old rusty fasteners off, the six point socket is less likely to damage the head of the fastener.
A couple of dead-blow hammers are useful.
Take care of screwdrivers. I replace them when the tips wear out. I buy mostly SnapOn screwdrivers, and they basically don't guarantee them at all, but they are much better than Craftsmen screwdrivers. They are not meant to be hammered on. I bought a set of "demolition screwdrivers", (from Stanley, at Home Depot,) that are made to be hammered on if need be.
I have carried this very high quality mini-ratchet set around the globe, in a field service tool kit, to work on very intricate mechanical equipment, and it has been extremely useful, and has never failed: [Invalid or Expired Link Removed].
I have bought a LOT of SnaOn tools, and I find that for rusty/stuck fasteners, they are more likely to work than other brands, BUT their guarantee, is probably the worst of any brand.
I could tell you of numerous problems with SnapOn tools that failed on first use, where the dealer acted like I did not know how to use tools. I still buy them, but I hate the dealers, and the warranty.