You need to run very often. Without a team, you can lose the momentum to get out the door easily. This is copied from a post that has been echoing around on Letsrun for a while. This is training so that you will be ready to train come fall.
"If you're like me, you may find out that you prefer this type of training to your previous methods. I have been following the same basic schedule for three years now:
M-50 minutes with 6-7 miles @ aerobic threshold (10 sec slower than marathon pace)
T-50 easy plus striders
W-50 minutes with 3 x 1 mile at 12k pace (90 second rest)
R-50 minutes easy plus striders
F-50 minutes easy plus striders
St-2 hours medium with striders
Sn-50 minutes easy plus striders
Throw in one or two races per month and you've got a nice recipe.
On this training, I have run 15:12 5k, 31:30 10k, and a 2:28 marathon---not PRs, but within 2.5%. That is, I'm training at 50% of my former training mileage, but racing at 97.5% of my personal bests. I actually like running again too.