Actually, TDM works all right with me for pistol kills.
Okay, so here's what you want to do:
1) Flank (silencer recommended, if available)
With a silencer, you can take out the entire enemy team one by one from behind. Easy as pie

Without a silencer, you just need to be able to aim. Take 'em all out quickly.
2) Use akimbo
A great attachment for pistols if you don't try to snipe with them. Perfect for running around the map run and gunning. Also great for flanking when you don't have a silenced pistol, although akimbo works well with the silenced ones too.
3) Last Stand
Even if you're using akimbo, the pistols generally have good enough hip-fire aim that you won't need steady aim. In this case you should use last stand. If you're good with it, you can average around 5 extra kills per match.
(I don't recommend using this with akimbo, it may be all right for you but personally I find it easier to take people out from a distance while I'm in last stand, and akimbo doesn't help this much)
Hope this helps.