get fit

i need to get fit and lose some weight again. Well not really weight
but some fat. I've put on over half a stone since canada and clothes
feeling tight.
I got an email about receiving my race number and chip within the next
10 days for the great north run, i still haven't made my mind up
whether to do it. I really want to, i need to get a long run pushing
10 miles in the next 2 weeks to see how i go.
I have barely done any running since my heart problems and not sure if
i'm gonna get angry with myself if i can't run it as well as i want.
Having said that, that is usually when i'm at my best when i'm angry
with myself, fire myself up.