The weighted sled is a great tool. Honestly, you can make up any HIIT sessions. The intensity is really all that matters. Mix it up with things you really enjoy and look forward doing. create a list. Mountain Climbers, box jumps, jumping jacks, kettlebell swings, battling ropes, bench step ups, sprints, burpees, jump rope, tire flips, sledgehammer swings, bodyweight squats, dumbell clean and press, goblet squats. But what ever you choose to do, do it for a minute straight. Since you are lifting in the evening, you may want to choose movements that don't involve the muscle groups you are going to be working later that same day. Main thing is to have fun and enjoy it, and look to improve on it.