In order to execute the very popular and attractive lipslide, learn boardslides and frontside 180s first. Approach the obstacle as you would for a 50-50. Pop your ollie and start turning yourself (and your board) frontside, making sure your back truck is high enough to go over the obstacle. Once you are hovering above the object, perpendicular to it, land in the boardslide position. From here on out, it's just like the ol' boardslide; just cruise along that rail or ledge as long as you can and come off like you would a boardslide. No, wait, scratch that. If you're bustin' this lipslide on a ledge, then your back wheels should be sliding along on top of the ledge. When it comes time to come off the ledge, put pressure on your tail so that all your weight is on your back two wheels. Then turn your board forward and roll off of the end of the ledge. There, that's better.