THINGS TO THINK OF FIRST:
If you are going to attempt any or all of the simple procedures in this guitar page, you should assemble these tools:
(1) electronic tuner and cord to plug it in with.
(2) Allen wrenches that fit your guitar (one large for the truss rod, one small for the bridge. You have to check them but the smallest one made is usually the correct one). New guitars usually come with the correct ones.
(3) Phillips head screwdriver
(4) wire cutters are nice, but a set of pliers will do.
(5) fingers…10 preferably.
(6) brain (optional)
If you are going to do ALL of this stuff, it’s BEST to do it in this order: Put on new strings, adjust the bow, adjust the string height, and then adjust the intonation. None of this is complicated, but patience goes a long way.