Oh man, it's hard to find a good tailor. I had a great one when I lived in San Diego, but haven't found one in central Texas yet. When I do get a lead on a good tailor here, it always comes down to a language barrier. 2014 is the year I learn to speak Spanish.
I'll hand sew small areas, buttons, etc. I have a sewing machine I can use pretty well for drapes, pillow cases, bags, and other easy stuff.
Things taken to the tailor: torn tent, cycling jerseys, suit jacket and trousers, strap added to backpack, T-shirts.
If you can find a good tailor and a good cobbler, you're way ahead of the game.