Thanks, CatalinaWOW
So, for the heat the joint then hit it technique, do I just use a soldering iron, and then immediately strike it against the ground? and for the wick, do I get like a flux pen and then apply it to the wick?
You will have to experiment with what works best for your situation. With large PWBs grab one edge in a vise. Pull the board as far as it comfortably will go and then heat the joint. When the solder liquifies, let go. The board will spring away, and often leave the solder hanging in the air. Or flying out the other side when the board springs back.
You can strike boards against the ground, but in many cases the dirt/grass/whatever is soft enough that solder is not shocked out of the joint. A board, or rock or bench or other hard surface works better.
A soldering iron is the safest thing to use for heating the joint. If you have access to a propane torch you can also use that, but with far greater risk of damage to components and of starting a fire. The torch can be faster, but I don't recommend it until you have a lot of experience and have parts you really don't mind losing to the process.
Think through the physics of what is happening. You are trying to cause a large acceleration that will cause the solder to overcome capillary forces and leave the joint. The shock you will need is strong. Many g's, preferably just less than the damage threshold for the components involved. You can think up methods that are appropriate to the equipment you have, your skills and coordination and the parts you are trying to salvage. This technique isn't what you would want when repairing high value equipment. There is risk of damaging things.
I re-emphasise, if you are going to do this, protect your eyes and for best protection wear long sleeve shirts and long pants and shoes and gloves. There will be solder splatter. You may be tough enough to ignore minor burns on your arms and legs, but losing your vision is something you really don't want to do.
I have not used liquid flux in a pen on solder wick, but it should work. The downside is that it won't be long lasting. Resinous flux will stay good (and messy) for years. In my experience it is also cheaper. A downside is that it is more difficult to clean, but in this application cleaning is not a problem.