It depends on yourself lar, everything got progress, instant progress only makes u suffer (e.g hack, aimbot, etc ).
My way:
1. Look for weapon that u think comfortable the most for u, just don't use P90, and GL lar, they won't make u improve, it will but slow.

2. Don't use gay perks.

3. Seek what's your style, if u really comfortable with it, then focus on it.

4. After kena own and owned, u look what's your weakness and strength, minimize and looks solution for your weaknesses, and improve your strengths. Mirror your skill often.

5. Play often.

Those are my way to improve, hope it helps.

Cheers,
[XEF]syNc

So when they talk about your girlfriend u also will know when they're near u.