The type of service (HD, locals, etc) will affect how many satellites (and which) you need to get. I've set a number of 110/119 (Dish 500?) dishes. Some have been easy, some not so much.
Basically, first make sure your pole in the ground is plumb. Second, using either the charts in the manual or available online, get the skew angle (probably won't change), az & elevation settings. While the dish is on the ground, set it (7/16" bolts) to the right settings. Mount the dish on the pole, connect the receiver, go to installation, and setup to look for 119. Move the dish left/right to peak, then up/down, then left/right, then up/down. If the receiver says it's looking at 110 (wrong satellite) you need to point the dish more to the west. Once you get a good signal on 119, change the receiver to look at 110 and peak. Check 119 again.
If you have HD, you'll need to get a lock on 129 also (unless you're using the Eastern Arc, I don't have those satellite numbers in front of me).