Just replied on another thread:
DH is getting:
a new jumper (exactly the same as one he already wears in a different, pre-approved colour),
an eye mask/headphones combo (he sleeps with an eye mask anyway, and has seen this one with built in headphones which should be less disruptive than him scrabbling around for his headphones every night),
some running kit (including a reflective skin balm so he can be seen at night)
Maybe some BBQ accessories (got a new BBQ over the summer), quite like the pizza oven suggestion.
Pants and socks!
Other suggestions: new Barack Obama book? Economist subscription? Various handy tools (I got him a great small bike tool kit which is small enough for him to take out with him when cycling, and he's in love with a recent purchase of an electric screwdriver!), a man bag, Smart Watch (if doesn't already have), washbag filled with toiletries,
Generally he's pretty practical and doesn't want novelty gifts. He wants what he wants, and on the whole, my 'thoughtful' off list gifts aren't as well used.