Make a list of 100 things you like in no particular order. Avoid the obvious (significant other, cake...) and be completely honest with yourself. If you try to think of things that you are curious about and inspired by, you'll end up discovering a lot about yourself and in doing so developing a sort of bank of your interests and ideas.
So, here's my list. (And if you're tempted to do the same, please do: it's extremely therapeutic.)
1. the way birds walk, including ostriches, excluding pigeons 2. the moment you give up trying to impress someone and admit something geeky and they get with it anyway 3. laundry smells 4. sliding into bed naked 5. thinking about the victorian era 6. sliding into a bath 7. beautiful handwriting 8. freckles 9. boulder-hopping in rivers 10. surprise letters through the post 11. programs about architecture 12. debbie drawing me cartoons 13. a good bra 14. tea and cake 15. the name 'scout niblet' 16. singing songs in a car with pals 17. staying up all night because there's too much to talk about 18.creating happy lists 19. heads in laps 20. haircuts 21. compliments 22. waking up from a doze to hear a song you'd not paid attention to before 23. surrendering to tiredness 24. clean sheets 25. camping in the wild 26. museums 27. that there is a place called ouagadougou 28. trains pulling out of stations (with me on) 29. baking 30. steamy windows of tea shops 31. kissing 32. 'thank you's on album covers 33. letting go 34. david shrigley 35. casting off 36. mum-cooked food 37. sitting between my neice and nephew 38. birdsong 39. sit-down gigs 40. post-exfoliation 41. good hair days 42. when anticipated problems never even arise 43. second-hand bookshops 44. steven appleby's cartoons 45. humour hidden in serious programs 46. edinburgh 47. bringing homemade cookies to work 48. agreement 49. crossing off items from a to-do list 50. a film you can love everything about 51. www.flipflopflyin.com 52. making plans 53. little kindnesses 54. eurostar 55. ripe cherries from next-door's tree 56. irreverence 57. when people use my name in conversation 58. sitting upside-down 59. parks 60. canals 61. first hand-holding 62. laughing with strangers in public places 63. scandinavian accents 64. developing a film you'd forgotten about 65. laughing hard 66. dimples 67. good tears 68. skin that smells of the sun 69. showering after a day at the beach 70. curry 71. being impressed by your friends 72. wooden shutters 73. being unable to stop listening to a song, it's so good 74. the alps 75. monkeys 76. karaoke 77. downtown manhattan 78. the internet 79. the way britain looked in the 1950s 80. colour photocopiers 81. being unable to stop smiling 82. lip gloss 83. boxes 84. small-town friendliness in a big city 85. coastline 86. watching the stars out of the back window of a car 87. franglais 88. shop mannekins in funny poses 89. coming back from holiday and still smiling at strangers 90. olive oil in tins 91. houses painted pretty colours 92. port meadow, oxford 93, unabashed intellectualism 94. gingham 95. country lanes turned into tunnels by trees 96. resting my head on my shoulder 97. devon 98. pain au chocolat 99. the anticipation of finishing 100. completing tasks, even if they were fun