I'll try and think of 'tactics' to help.
NOTE: These aren't perk glitches,these are just the easiest way to get it that I can think of.
Blue Perks (Tier 1)
Marathon- Check Fletchers' original post.
Sleight Of Hand-Use it normally,no real trick for it.
Scavenger-Do headshots and let the blue bags pile up. Then throw a special grenade or grenade and keep picking up the bags. Keep repeating.
Bling- Use a noobtube (easiest way to get kills) along with a HBS sensor?
One Man Army (OMA)- Like Fletcher said,use a noobtube with danger close.
Red Perks (Tier 2)
Stopping Power- Use it normally,or you could use it with a noobtube?
Lightweight- Check Fletchers' original post.
Hardline- Use these killstreaks: UAV,Carepackage and Predator Missile
Cold Blooded- Check Fletchers' original post.
Danger Close- Best done by using One Man Army (OMA) with a noobtube.
Green Perks (Tier 3)
Commando- Either run around with a tactical knife,or just use your knife normally.
Sitrep- Have a friend and you get into a cagematch. Make sure you both have One Many Army Pro (OMA Pro) and use claymores. If you do it fast enough,you can get it done in 1-2 games. I got my friend 89/120 for sitrep,in 1 game.
Ninja- Use it normally,or play hardcore? I don't really know a tactic for ninja.
Steady Aim- Either run around spraying your guns,or use akimbo weapons. All akimbo weapon kills count as hip-fire kills (provided you are infact using steady aim)
Scrambler- Same as ninja really.
Last Stand- Check Fletchers' original post.
You may not agree with these 'tactics',that's fine. After all,these are my best views on how to get each pro perk. Take my word for it,this is good advice coming from a guy who has all pro perks and all perk emblems :cool: