This is very simple and yummy! The trick is not to over-marinate or over cook the salmon--it will get mushy.

3lbs Salmon
3Tbs Balsamic vinegar
1/4 C Vegetable oil
2 Tbs Brown sugar
1 Tbs Honey
1 1/2 Tbs Soy sauce

Combine all ingredients into a large ziplock bag, or pan. Marinate for 1-2 hours in the refrigerator. Grill on med-high heat (skin side down--if there is any), covered for 7-9 minutes. Rule of thumb is 10 minutes for every inch of thickness.  Also keep in mind that after you take it off the grill and wrap in foil, it will continue to cook. Enjoy!