Much good information above, but let me add something. After doing this 20+ years, I still have to learn a lot quickly when I maiden one of my (or someone elses )planes. After doing all the checks and have the plane lined up to take off, I like to have another pilot stand next to me to adjust the trims when I get the plane airborne. I can concentrate on keeping the plane flying as I tell my extra hand on what way to set the trims to get pretty straight and level. Usually my planes only need a little trim (sometimes none), but I've maidened plenty of planes that were a handful, thank goodness I had the extra help to get the trims set enough of safe flight until I could get the plane down to make mechanical adjustments.