The best and perhaps fastest way I know, is combining the big 5-7 compound exercises and eating plenty. (eating enough is a very important part of bulking)
5x5 type stuff works well for many, (not necessarily the only set rep routines but there is long history on it) since it gives the trainee rep ranges to use heavier weights, but still uses enough volume as well.
Monday:
Squats 5x5 (or leg presses if avail.)
Bent Rows 4x8-10
Abs or core
Tuesday:
BP's 5x5
OHP's 4x8
Arm/grip work
Thursday:
Deads 3x5 (or suitcase lifts or trap-bar lifts)
Chins or Pull Downs 4x8-10
Abs
Friday:
Dips or Incline presses 5x5
OHP's 4x8
Arms
Or loosely something along those lines could work. It really does not have to be a 4 day split as there are many ways to do this kind of work. You are hitting the hips legs and back 2x per and the upper body as well, covering a good 90% of the body's mass thru the week.
The most important factors are going to be, focusing the energy on the big stuff and increasing loads over time, while eating plenty. Everything after that is less important IMO.
You will grow
