Hi Eric,

I would recommend finding a schedule that suits your lifestyle.

If you can find time jog in the morning and late afternoon, that would be idealistic.

Eating lots of nuts, and lamb for protein will help make your muscles stronger.

Also, when your at home, It would be wise to do 10 - 20 push ups each day.
And 10 - 20 sit ups each day, to get you fit for the Race.

I hope this helps you,
If you need more help, feel free to ask.