a little suffering is good for you. builds character, strength, size, and mental strength.
best bet to do bigger lifts first, generally speaking. best to save things that are harder on your body until the end. for example i almost always do skullcrushers or lying tricep extensions last to make sure my elbows are nice and warmed up.
"Abs on a skinny guy are like big boobs on a fat chick - they don't count." -Shelby Starnes