Nothing motivates like peer pressure. Get in with a group at a local running store or club that is also targeting a fall marathon and join them for long runs on the weekend. Your midweek runs will get more regular as you strive to keep abreast of your new running partners on the weekend. The comment about family support is important. Sounds like you need to make it non-invasive. May mean running later in the evening midweek and early (really early) on weekends. You might even wash your own running stuff as it piles up each week (sounds trivial but might help). Also, move the runs around if they're interfering with family stuff or work. Keep a log book. If you're targeting a certain weekly mileage, you'll know if you're making it or not. Also, I agree with the point about mixing up the runs. Set out some different runs and give yourself variety in paces, hills, track, easy vs. hard, etc. A heart rate monitor can help keep it interesting too.