Of course, @wingbingo - happy to help! Is it your first marathon?
Firstly, your training at the moment sounds good, but I'd suggest adding in an extra run; a 3 or 4 mile recovery run, the day after your long run. Make it easy pace (at least as slow as your long run) and flattish. The aim is to ease out those muscles and stop you stiffening up, while getting some more all-important mileage in.
Second tip really depends on what your aim is. If your aim is just to finish, then disregard this. But if you're aiming for a certain time, then make sure you incorporate running at that marathon pace into your long runs (5 miles in the middle will do!) That's because, as I've learned myself in the past, you cant expect to do all your training at, say, 9 min miles and then run 8 min miles on the day. You'll blow up and it will hurt 
Next tip is a key one - the Big Five. Make sure you do at least 5 training runs of 18 miles or longer. You're getting your body used to spending a lot of time on feet. If your long runs are at 10 min mile pace then that's around 3 hours, which is a good length of time to also experiment with fuelling..
...which brings me to the next point. Fuel! Experiment on your long runs and see what works for you. Most people can get around a half marathon on no extra fuel, but a marathon is an entirely different beast. You need to get used to taking on fuel while you're moving, so try various options and see what suits you best. Then, most importantly, do this on race day! Again, I've fallen foul of this before as I thought it would be easier to have the gels provided at the event rather than the ones I wad used to. I threw up everywhere and ran a terrible time. Would not recommend!
Finally - do not underestimate the distance. In my experience, a 10k is roughly twice as hard as a 5k, and a half is roughly as hard as a 10k. A full marathon is 3 or 4 times as hard as a half. They say the race starts at 20 miles and, when you get there, you'll know why. You learn things about resilience and strength at miles 22/23 of a marathon that you never knew you had in you. This is a good thing! But it needs prepping for - hence the (at least) 5 long runs , and the organised approach to fuelling.
I've run several marathons, some slow mountain ones and some fast road ones. It's truly an amazing experience. Good luck to everyone doing their first!