Try them. If you like the way they taste now, don't worry about steeping. I really like bakery/custard/creamy flavors, and for my taste I prefer to let them steep for a couple of weeks or longer.
I usually steep our eliquids just by putting them in a dark place - currently a cheap toolbox from Walmart - with the caps on, and just let them stay there. I usually try to mark the date I receive shipping confirmation (I order mainly online), and try to use the older ones first.