I'm looking for a novel similar to Ace of Ace and I'm Really a Superstar were, the mc tackles normal goals with a cheat like ability. Preferably, it should be set in the modern world Thanks
http://www.novelupdates.com/series/riaru-de-reberu-age-shitara-hobo-chitona-jinsei-ni-natta/ I think this fits it pretty much, Modern world, real life level up.
+1. Highly recommended IMO. The game like system isn't OP, and it serves more as an aid for the story rather than having the story revolve around it.