If still got lag go get/make a new computer with better internet connect
Reducing A Lag , its Like playing A Blast :D
STEP 1: Open your userconfig.cfg file
Located in your cstrike dir, with a file editor (if it isn't there create it):
(C:\Program Files\Steam\SteamApps\USERNAME\counter-strike\cstrike)
STEP 2: Insert these lines:
fps_max 101
rate 25000
cl_updaterate 101
cl_cmdrate 101
OPTIONAL STEP: Now if you still have lag try this:
When in-game press:
Control + Alt + Delete > search for hl.exe > right click on it > Set Priority > Low (Low not High)
Hope You Will Like It ..! Post Your Comments If its work , to prove this Post ;) ThanKs!!

Gr88 Man ..! Its WorkEd////