Spice It Up!!!

My Fiance and I are TTC our 2nd Child...It's a little harder now that we work to different shifts...I'm a ER Nurse I work 7pm to 7am 5 nights a week and he's a Electrician he works 9am to 6pm Monday thru Friday..We sleep together two nights a week...and if we are not too tired we just have Boring sex lol...so my question to you guys is what can I do to spice up our love life..