I know this probably sounds sarcastic (its not tho) - look in the owners manual!
it goes through everything step by step and the instructions are (obviously) specific to the bike - thats important because if i remember right the chain slack for the Ten is checked when on the sidestand, which is unusual.

no disrespect intended to anyone else who has posted in this thread - but if you're new to all this then the owners manual for the bike really is the best place to find the right info.

as has been posted already for chain adjustment you'll need a 22mm spanner/socket+bar for the rear spindle nut - i use a ring spanner (put the spanner on the nut with the open end pointing to the front of the bike and put weight on it with your foot. likewise point to the rear and do the same to tighten)

hope that helps
Pete