Different speed animations?

I’ve noticed when I make an animation that objects tend to slow down towards the end of the cycle. This is a problem because I’m trying to make a smooth loop and don’t want it to be slowing down and speeding up. Is there a way to equally spread motion out between keyframes instead of using the default?

You want to change the default keyframe type from Bezier to Linear. Open up User Preferences and click the Editing button along the top. Change the F-curve default type to Linear. Then click for it to become your default. After making this change any new keyframes you make will travel at the same speed from start to finish.