techniques of soldering

Here are some good and correct soldering techniques (maybe usefull) :

1. used solder with solder eyes of sharp-pointed
2. used solder with a power 30-40 watt
3. make sure copper PCB surface finish, if opaque then "amplas" with a fine amplas
4. losed rust on the feet of component to became glitter
5. time for soldering. Solder paste on copper PCB (not to long) then paste in tin solder good enough, wait until
search for tin and spread
6. after that tin spread throughout the area solder, and keep waiting until they cold
7. good soldering is a strike with the foot copper PCB components with small amount of tin (mot convex), and does not taper