Jessica mentioned my suggestions. I got a Bob Revolution jogger and it has been a lifesaver. It's pricey, but worth every single penny IMO.
The childcare at the YMCA has been the thing that gets me to the gym. It's SO nice not stepping over and around little people and being able to exercise without worrying about your kids. If $$ is a concern, go talk to them. DH took a ginormous pay cut last year and they ended up giving me an 80% scholarship so I only pay $9/month for my Y membership.
"It is not the critic who counts; not the man who points out how the strong man stumbles, or where the doer of deeds could have done them better. The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood; who strives valiantly..."