Critique my workout

[InsaneInTheMembrane]

Here's my workout program...been sticking to it too long i suppose...need you guys to reccomend ways to shake it up..:

Mon: Chest/Tri
Tue: Delt/Bis
Wed: Off
Thur: Legs + abs
Fri: Back + abs
Sat: Off
Sun: Off

I train using 8-12 rep range, heavy weights, 2-3 minute rest between sets. 12 total sets for each big muscles (chest, quads, back) and 9 sets for each smaller (Bi, Tri, Delt, Calves, Abs)..workout lasts anywhere between 60-90 minutes...NO CARDIO yet!

First of all: Is this current program good?
Second: Even if it is, I've been on it too long...how to shake it up for busting my plateau?

answers appreciated
thanx

[dreamache]

yeah you shouldn't stick to the same routine for too long... no more than a couple months imo... theres many ways to change up your routine... and many ways to shock your body... get arnold schwarzenegger's encyclopedia of modern bodybuilding.. 750 pages, very informative w/ pictures n' everything. in the process of reading it now