I have the micro Sukhoi SU26xp, and I really have to argue with myself to wait for "No Wind" conditions. You get anxious to fly and where I live days with no wind are few and far between. It really takes some patience to not put it in the air when it's a little too windy. That's my first suggestion.
Second, go over it a couple of times looking at the lines and make sure the trim looks centered up and things like the rudder and elevator are straight. You don't want any surprises with trim on the first flight. I am sure there will be some adjustments as there always are, but hopefully you can keep them to a minimum.
Third, take it easy on the first flight, even if it's just a takeoff, circle and see what the final approach looks like. I have been watching a few videos on youtube and I am seeing a lot of people who tend to go full power and when things get a little squirrely just keep the throttle wide open. It tends to end in a plane augering in. Get it in the air and then slow it down a little. No need to stall it out, but you don't have to rip the wings off either. Make a few circles and get an idea of how it's going to fly and then start preparing for your landing.
Just my $.02 .