During breakfast we saw our first hummer of the season! He may have been here for awhile, but we just noticed him for the first time this morning. He seemed to be very happy for the hummingbird feeder which has been up for a month anyway.
I make about a months supply at once. Of course, I don't have tons of hummers so this takes care of my needs. 1 part sugar to 4 parts water. I bring it ALMOST to a boil. Just enough to melt the sugar, but not burn it. I let it cool and put it in a glass milk bottle which I keep in the 'fridge until I need it. When I want it, I pour it into the feeder and nuke it for 10 seconds. Then out on the deck hook it goes.
Remember you don't want to let it get moldy, so change the nectar at least weekly! I try to do it on Sunday, or whenever it gets empty.
If you haven't seen hummers around your yard, don't let that discourage you. Put up a feeder anyway, you may be AMAZED to see that they are in fact, in your yard. Once you are aware of them, you'll see them everywhere.