I like to raise the mainsail first. If I raise the jib first, the boat tries to turn itself downwind.

I raise the mainsail, set its downhaul, hook up the mainsheet and crank it in TIGHT. Then I raise the Jib, crank its downhaul as tight as I can without compromising it's shape. Then release the mainsheet.

Now, whenever I crank the mainsheet tight it will automatically pull the luff of the jib just as tight as I want it. When I ease off the mainsheet, the luff of the jib is loosened a bit.

Also, if the wind is blowing offshore and I've launched from a ramp with only seawalls along the shoreline, I've been known to hop on the boat and let it drift while I raise the sails.