I guess it is all about perspective...and getting the right one..
You know...
Watching Forresst Gump (Always makes me feel better about myself)
Trying to beat my Personal Best on eating a box of jaffa cakes (1 min 51 secs) with cup of tea to assist..but my goodness..my jaw ached after that.
Following my dog around on all fours...like a dog..(confuses the hell out of him..and is really childish when you get caught..and no i dont pee in the garden like him...but going down the stairs is a bit tricky...makes you wonder how they do it so fast)
Chav spotting...
Buying sweets you havent eaten for years...like sherbert dip..(if that term has any sexual undertones I am not interested at the moment)
brewing a massive fart and truely enjoying letting it rip...(you know you all love it so dont pretend you dont!!!)
I know these are all trivial things and some would say not relevant in this situation but they do make me smile...and that is half the battle... perhaps this is how we can help you on this site...compile a list of challenges and tasks for you to do over the next few weeks ...all with the objective of making you smile and help realise there is a lot of 'World' out there to enjoy,
Anyway...hope this ..or some of the better advice helps

I know you have said you have tried burying yourself in work and other things but were they particularly positive things?