Maintaining fitness when you travel needn't be difficult nor time consuming. And you know it's definitely worth putting the effort in when you return home and do your first training session - a few workouts while you're away can be the difference between sliding back into your regular training and continuing to improve or a whole lot of suffering and trying to get back to where you were before.
Here are some simple ideas for equipment that is suitable for travel and programs you can do pretty much anywhere.
1. The Gymboss
The Gymboss is the best way to keep your travel workouts on track and stop you from stuffing around. You can set the Gymboss for interval training (eg things like tabata where you work for 20 sec and rest for 10 for 8 rounds) or use it as a timer.
The Gymboss is handy for a couple of reasons. First, if you work for time, regulate your rest etc then you will often work harder than you would otherwise. Second, if you work for time you know exaclty how long a workout is going to take so you don't waste time.
If you just have the Gymboss and yourself you can do bodyweight routines such as these:
30 sec work/20 sec rest
- Push ups
- Alternating lunges
- Burpees
- Floor bridges (on shoulders)
- Mountain climbers
- Plank
- Tuck jumps
- Scapular push ups
Try doing 3 rounds of this (you may need to rest between rounds).
Or...
Set the Gymboss for 5 mins/2 mins. Pick pairs of bodyweight exercises to superset (eg bodyweight squats 20 reps/push ups 10 reps) and get as many supersets out as you can in 5 minutes. Rest for the 2 minutes then start the next 5 min superset block (eg burpees 10 reps/crab walks 10 steps). Try doing 4x5 min superset blocks.
2. Power Bands
Power Bands are light, easy to use, inexpensive, require little room and are very versatile making them the ideal training tool for travel.
The bodyweight routines above are a really good way to keep fitness levels and strength up, but one area that is quite difficult to work with bodyweight alone while you're travelling is the upper back. Band rows are a very simple way to rectify this and ensure your travel program is balanced.
A door jam is very handy for band training on the go. 
A simple routine using bands and bodyweight that can be easily done in a hotel room:
As many rounds as you can in 20 mins
- Band row/reverse lunge (see the video below) 10 reps (count each row as a rep)
- Push ups 10 reps
- Band thruster (squat push press) 10 reps
- Burpees 10 reps
- Band wood chop 5 reps each side
3. Aqua Bag
The Aqua Bag is my favourite piece of travel equipment. The Aqua Bag is only a couple of kilos when empty and packs down to a small size so if very easy to travel with. All you need is water to fill it up and you have a deceptively brutal training tool.
The Aqua Bag is great for power endurance training and if you want really short and sharp workouts while you're away this is definitely the go. Try a 10 min set of Aqua Bag clean and jerks (without putting the weight down) or, if you're really game, a 10 min set of Aqua Bag snatches. These movements are great because they get everything working and work the whole body in a balanced way.
High rep clean and jerk
High rep snatch
If the 10 min sets aren't that appealing to you, you could try something like this (with your gymboss):
45 sec work/15 sec rest
- Aqua Bag clean
- Aqua Bag thruster
- Burpees (you can't have a travel program without them!)
- V-sits
- Aqua Bag overhead lunge
- Aqua Bag snatch
Do three rounds of that and you've got a pretty decent workout in under 20 mins.
So...
As you can see there are plenty of options for training when you travel so there are no excuses for losing fitness while you're away!