I'd give the bike a good tune-up/service as you don't always know how the previous owner took care of it. Items to inspect/change: Air filter, plugs, oil & oil filter, coolant, brake fluid, fork oil, fork seals, final drive oil (if shaft drive), fuel condition (especially if the bike has been sitting), battery, chain (if chain drive) and definitely look at the condition of the tires - are they worn, dry rot, cracks, etc. . . a tire problem with a car is one thing, but on a motorcycle it could be deadly. Give the bike a good wash - even if it's clean so that when you dry everything off, you're forced to take a close look at all the different parts. Look for leaks, loose nuts, bolts, fasteners, missing parts, broken wires, and so on. How are the cables and do they need to be adjusted (clutch and throttle). Check the fuel lines for cracks, leaks, along with the carburetor(s). I'm sure there are other items that I can't think of right off the top of my head that other members will add to the list. Read through your Owner's Manual and look at the service section. Invest in a good Service Manual too. I have a 2009 Honda Shadow Spirit and periodically I have to check the valve clearances.
Good luck and have fun!!! How many miles on the bike? The reason I ask is that wheel bearings and fork bearings might need to be inspected and it might be good to look at the front brake pads and rear brake shoes. I like to know that my bike is in A-1 condition before venturing out on a ride.