If you're going to do wheel work, you need the proper equipment to do it. Truing stand, dishing tool, spoke tensioner tester, and spoke wrench. You don't really need the very expensive equipment. Skill is the most important factor.
I got all of my equipment on line for less than a $150. I can generally get most rims within a millimeter of movement both horizontally and vertically.
I strongly recommend using double walled rims. Once you have the rim trued put the tire and tube back on; then inflate it to max pressure. Next do the hard bounce test. Hold on to it while striking the bottom of the tire on a paved surface in several different spots. Remove the tire and put it back on the stand to be trued again.
Then all you should need is to true your wheels once a year. Unless you're replacing spokes a bounce test won't be necessary anymore. I like Saphim, DT and WheelSmith spokes.