You'll kick off today by spending some time under the bench. You're going for strength, so use the proper percentage. If you wuss out and "take it easy," you can kiss your results goodbye.
Remember, though, it's essential that you perform each movement with proper form. Try not to let your elbows flare out at the bottom, and keep your entire body engaged. I like to maintain a slight arch in my lower back and press through the floor with my feet. Your upper back should be tense and your shoulder blades pulled in.
Chin-ups are not the same as pull-ups. To perform them, use an underhand grip. If you can't do more than four, grab a band or hop on a machine. Keep your body straight, and pull up until your chin is over the bar.
Pairing two pulling movements is rough! By the end of the third round, your back and biceps should be feeling the burn.