Yay soldering 101

So I have been practising my soldering lately, I have some...electronics I need to attach to some...other electronics and so have decided to go the do-it-yourself route. Armed with my trusty soldering iron, wire and solder I am getting ready for the real thing. Been practising soldering wire onto old pieces of circuit board to get an idea of what to do.

I mean its simple in itself and Im getting better (never soldered before this), but I want to be sure that I do a good job so I dont wreck the equipment. It is the price of the stuff that concerns me. I dont want to have to buy new things if something goes wrong.