How to improve my golf game in a week in order to get ready to a competition?

I've played al my life, but i stopped playing for six months, then i decided to participate in this tournament in my town, i went play i was hitting the ball pretty well, long shots were no problem but my short game sucked, really, putting for birdie, then three puts, my chips were awful, i need to get ready, i still have 4 days to get ready, what can i do to get my short game back?