Reverb you know you like to use it but using reverb on a lot on instruments can cause you mix to sound muddy. Here is an easy fix that will help 
clear up some of that essential real estate.

1. First off make sure that you are using you reverb as a send and not as a direct insert

2. Apply some reverb to what you want but usually if it's noticeable it's too much unless it's an intended effect. What kind of reverb are you using? It may come in with built in EQ controls. Mud usually builds up anywhere from 60hz to 400hz. Take advantage of scooping out some of those frequencies with the built in EQ if you notice that you  have to much low-end accumulation.  

3. Lastly, some reverbs don't have EQ so the best solution is to send your reverb to a bus and then EQ with your own preferred plug-in. Most EQ's will work just fine or even a High Pass Filter. Use you ears and find out where those offending frequencies are.