Grabbing a piece of graph paper and hand-drawing some "pixel art" is quite relaxing due to its simplicity yet gradual complexity. Check out "Zentangles" for other interesting simple->complex doodles.

You can also try listening to a talk radio (CBC Radio 1 is great), or some podcasts. Podcasts will be pretty simple to stick to a routine, since there are some that come out weekly (or even daily).

Good luck!

Get back to the nature. Whether it's hiking, jungle trekking, swimming in the ocean or running on the beach, it's totally reinvigorating. While you are doing it, breathe deeply and enjoy the sights and sound of the surrounding - you will come back a renewed man.

P.S: I'm very fortunate to live in Penang island (Malaysia), where all those things I mentioned just 20 minutes away from my house.

+1. I am very fortunate to live in Sydney, where ditto.

I read on my Kindle which is not like looking at a standard screen or you could read real books. I also find manual drafting relaxing, but other hobbies like drawing, knitting, or crocheting can be relaxing non-screen things to do.

I personally can't relax unless my mind is being stimulated in some way, so I make stuff. If your purpose is solely to relax (as it is for me), it doesn't even have to be useful. K'NEX and Lego are personal favorites if I'm mentally out of steam (you can never be too old for Lego!). If I'm looking for something more stimulating I'll get out my breadboard or something similar.

I know, I try to come back from work, switch off for sometime and then put in a few more hours at night building something interesting, so I don't really want to think at all if that's even possible.

Legos are an interesting idea.

Avoid digital rectangles. Begin to notice your breathing. Begin to pay attention to how your body feels, what goes around you (peripheral) and in front of you (3 point of awareness), explore hypnosis tapes and soothing music, reduce stimulus overload, return to nature.

Go to the local park and do some sprints on the grass. There's nothing more invigorating than running as fast as you can.

After the sprints, fall on your back and do some sky gazing.

The sprints clear your mind, the sky gazing relaxes you and lets your mind wander ;-)

I'm currently trying Vipassana meditation. I first heard about it from the "pragmatic thinking and learning" book. It's really simple to get started and it can really affect your concentration in a positive way.

Explosions in the sky (It's a band) either on my Ipod, or on our stereo.

This is the only band that paints a soundscape(picture with sounds, like a landscape) and I will listen.

Im sure the same effect would occur with classical music as well.

I go to see my girlfriend, play DoTA (sorry, computers again!), or just pick up a book and read a bit.

How about exercising in a stimulating way? Ie. Learning muay thai, rock climbing, etc.

Running for 2 hours at 160 bpm.

What's wrong with exercising?

Nothing at all, just that I've tried and failed multiple times to stick to a routine.

Have you tried walking? Doesn't really require a routine, you can check out the scenery and go at whatever pace suits you, energetically or moseying along. I have significant physical limitations and this is the only thing I can stick with (and I no longer own a car, so walking is built in to my current lifestyle).

Only do as much as you feel good doing. Most people when they start out do too much or expect exercise to give a bad feeling, I know I did 2 years ago. Hell, I was even famous for hating exercise in a show called Nerds FC. But recently I have started running reallly really long distances at an "easy" pace, and it is the most enjoyable, meaningless thing to do! When you enjoy it, you won't need a "routine", you will just let yourself indulge.

bit101bit@ubuntu:~$ shutdown now

A walk?

Lifting barbells.