Make your coaster interact with itself in interesting ways. Have central elements and build around them. Supports are as much a part of a ride as the track itself; head-choppers are great and add lots to a ride. Whenever you have track wandering around think how you can bend it to fill empty areas of a ride and improve pacing and flow. Here are some layouts I've been working on recently:
Each has central themes and builds around them. The first has 2 lifts as a centerpiece and duels underneath; above; and to either side. The 2nd has interlocking loops dead center with a lift going through them; and nested cutbacks looming over the station; and the 3rd (nowhere near done yet) has the station as a centerpiece with loops around it.
Boulder Dash was the only good roller coaster.
"or if you're when the hydraulic fluid was dumped out of the motor is goes 200ft up the tower and is like "LOL nope"" - CKMWM 2016