Nic 58 makes a very good point and I will repeat it. Whatever you do, keep your mind on what you are doing. No wife distractions, no kids, no animals, just you and your reloading bench.
And always, always establish a defined routine and perform your various reloading steps in the same manner, every time. Check your simple beam scale for accuracy (zero adjust and weight setting) frequently and do not rely on the accuracy of electronic scales. Electronic scale accuracy can be effected by static electricity, fluorescent lights, ambient temperature, magnetic fields and other influences.
Keep a pad and pen handy and record all of the details of everything you do when building a load. Number your recipes and number your targets before going to the range. Test and record all results and file your 8.5 X 11 targets in a loose leaf binder for reference later.
Use care when handling primers and if a primer gets stuck somewhere, be very careful when removing it, especially if it is in close proximity to other primers.
Lyman has a pretty good basic reloading book. Buy it and read it. Lastly, you don't need to buy all of the big bucks brands of stuff. Lee makes a very inexpensive powder measure that is accurate and their Lee Auto-Prime tool works great too. Many of my die sets are from Lee and I have built very accurate rounds from them.
Don't always strive for the hottest load. Most times, the more moderate loads are the most accurate. They are a lot easier on your rifle barrel's throat too.