I want to give a gift to my wife.

Buy gift of her choice.If I will be in your place then I ask her in indirect manner. I think better ask her in this regard not straight forwardly.First decide your budget.Then tell her that one of my collegue or friend wants to gift his wife something but he cant decide.He told me to ask your wife.So I am asking you what is suitable gift he buy for his wife in between this price range.The answer she gives is her choice.Buy the gift and present her.

Just be yourself and think of those things that are most precious to her. Do not get her a cleaning item unless she asks for it, though. Ask her what she would want and then add to that. For instance, if she just wants flowers, buy her chocolates and a necklace as well. Write her poem and take her out to eat at a nice restaurant.

i think a surprise trip somewhere where you can enjoy the sceneries and each other would be great...

Jewelry, flowers, anything related to a hobby of hers, a nice night out, a clothing item she has set her eyes on but thinks it's too expensive. Things like that.

instead of material things why not try giving her a romantic moment, like those on tv. sometimes it's nice to have something really nice to look back to