adding poundage

[Slickhead]

whats the easiest way to add 10 lbs to a draw wieght?

[macbow]

You need to provide more info.
Type of bow, wood glass recurve longbow?

For the most part usually a new bow is in order for that much gain.
If it is a,home made bow or one you don't mind cutting on the easiest way is to reduce the length2 to 4 inches.