I used to wait for those optimal weather conditions to fly, but it seemed those days are so rare, and even then, only parts of the days being optimal, I finally gave in and just decided to fly in spite of it. What I found out is that it's actually benificial to have some wind, especially during take off's, it can also be used to your advantage during landings as well, in my case, the bulk of my planes are belly landers so I don't have to land at a fixed spot. It was funny the day I gave it a shot, my girlfriend asked me, "you can't be serious about flying in these winds" he he. My hanger now is for the most part designed to accomodate them, ie. no or little dihedral at all and with some, symmetrical airfoil with nuetral incidence.

I suggest practicing on the sim's at minimum power and getting used to flying it 3d style, ie. trying to make it hover, it will be a handful and you will only get short intervals where it's steady, but this teaches you to counter the plane trying to veer off random directions which the wind will also be doing to it on it's own. Also, push your skills on the sim's flying planes you are not ready for, this will increase your abilities greatly when you at the field flying the trainers.