Whatever methods you choose to incorporate doesn’t really matter. Just make sure you do a little better each time.
Improved performance is the best indicator that you’re strength training correctly, and it’s also incredibly motivating because you’ll see how much stronger you get over time. Furthermore, you’ll have a positive goal to focus on when you enter the gym – beating your previous performance.
It’s not about burning calories or working yourself into a puddle of sweat with each workout – it’s about becoming the best you possible and being proud of what your body can DO, and this is where proper strength training really shines. Do not forget that important point.