Couple easy miles today, sinus/head all full/cloggy, not much fun.
Pick your training plan and follow that. They will usually include your current weekly mileage when helping to determine your target pace and distance. I'd say most will shoot for a 12-14 about 2 weeks before your race, with a week or two of taper. Find your own personal comfort level, and then plan to build from there. You really should be able to repeat the distance before you add more. So if you settle in at 8-10mi for that long run, then you would probably be able to ramp up in 2 months or so. If the full 13 miles is comfortable, then by all means hang out there, but an alternate would be to try to keep that 10mi base, but try to knock a few seconds off the pace each month. Depends on what you are shooting for.
Personally I'm working on getting back to that half readiness, which for me will usually involve doing basically a half Goofy every weekend. 10k or so Sat, with a half Sun. 10k on pace, with the longer run about 30 seconds off. Then to ramp up for a full, I'll alternate between increasing the short mileage one week, with the long mileage next week. So about 3-4 months of adding a 1/2m on Sat on week, then 1m on Sun the next. In an ideal world I'd get the long runs back up to 16 or so and keep them there making that mileage add easier, but don't have enough time in the schedule now for the extra miles.