Toks is right, go out and beat yourself up. Maybe target a couple of sportives where you say to yourself I am going to go out with the fast boys and try to stick with them as long as possible, if you blow then you blow and your time will be bad, but that is the point. Might be best to do that on local sportives just in case you need to get the misses to come and scrape you off the floor. I have had to get my wife to come and pick me up once or twice when I was literally 5km away from home but could not face turning the pedals any further.
Cheers
Marek...