Walk around with delusions of grander and perhaps adopt different character mindsets.. try it, and yeh ok technically its dishonest to act this way but you don't have to take it to extreme levels, film actors do this all the time as do musicians in their styles of playing they adapt off of their influences ..
the other day i walked into basketball practice pretending i was a modern day michael jordan and i ended up playing a cracking game, so it worked albeit fleetingly, ya know... i got home and had to sit through the crusifying big brother finale as i walked in half way through doctor who was on and i had to sit through BB08
i wanted to shoot myself in the head ..