Century Ride (first Time)

[Jim1957]

Need a bit of advice. I've been cycling for many years but have never done a century. I usually ride between 150 and 170 miles a week. Did 40 miles this morning, averaging 15 miles an hour. Here's the thing(s), I have no one to train with and no one to ride the century with. So if I'm gonna do it I gotta do it by myself, and a ride of that length is probably physically and mentally challenging, especially if you are riding alone. So, any things I should be working on to help me with this ride should I decide to do it?

Thanks
Jim