Well I used to run quite a bit and did 9 Londons in a row (fastest 2.56). As others have said it’s a bit late now for training but advice is always good.
Try and run a twenty ..this weekend would be ideal. The crowd will get you home. Don’t wear anything new or untested on raceday…ANYTHING !
Do not set of too fast ( or try to catch up schedule if you get a slow start). This will bite you in the second half…which is the last 6 miles btw.
Take a drink at every water station and look to eat a sweet or something after 13-17 miles or so. People are usually handing these out but you could carry a few gummy bears or something. You’d be suprised how nice they’ll be !
If you start to flag a bit just concentrate on hitting the next mile & once you get in the home stretch you can use the memory of your short local runs to lessen the “fear” of another 4 miles to go etc.
If you live local…go to the Exhibition & pick up your number early in the week and enjoy it. Maybe get a massage.
Enjoy the run..the atmosphere is just great…and don’t get to the park too early on race day if its still cold. Take a disposable t-shirt and bin liner to keep you warm & dry while you’re waiting to get going.
If someone is watching you on the course. Pick a specific spot including which side of the road for them to be. It’s a great lift to see friends etc but also a deflating blow if you miss them!
Enjoy your beer afterwards! Good luck.