If you have all the hand or power tools, (sockets/ratchets, torque wrench, breaker bar, extensions, pry bar, chisels, punches, etc) then you will just need a set of jack stands and an engine lift, an engine stand is a good idea but you don't absolutely need one.
Also make sure you have a camera to take pictures of where wires go and a lot of little bins and a marker to label and place nuts and bolts in.
It is much easier to remove the front panels (hood, bumper, fenders) so they don't get damaged.
Maintenance that should be done while the engine is out can be as extensive as you want it to be but there are several that really should be done that are very difficult when the engine is out.
-Timing belt, water pump, tensioner
-Oil pan gasket, VC gasket
-Steering rack & pinion (very difficult with engine in car)
-Clutch and flywheel
-Halfshaft and CV shaft seals for transmission
-Motor mounts or motor mount inserts
-Rubber hoses, especially between engine and firewall
-Valve lash adjustment
-Rubber grommets in firewall should be checked for dry-rot
Basic engine maintenance like plugs, wires, cap and rotor, etc should be done. Additional maintenance, like bushings should be done also since the car is already being taken apart.
You will need to also get all the fluids. Oil, coolant, trans fluid, power steering fluid, and some grease for good measure.
Make sure to drain everything before you start taking stuff apart. My buddy got trans fluid dumped on him once when his trans didn't drain completely. Trans fluid is really nasty stuff and will stain everything it touches, including skin.
Be careful with coolant, trans fluid, brake fluid, and clutch fluid as they will damage the paint.
It is also a good time to get some degreaser and scrubbing tools to clean the new engine and engine bay.
