Everyone likes exploring new websites and being amazed at what exciting things that you can do/find on them. Whilst I may quickly tweet about a new discovery when I find it (as I often use Twitter as a way of quickly sharing my thoughts - those people who are interested enough to follow me are likely to be of a similar mindset), I don't however like to talk too much about them at school as I don't want to force my ideas upon people.
One strategy that I do use instead is promoting particular sites as the 'website of the week'. This: initially started as a useful bit of filler material in the weekly staff bulletin, then extended to the early years as a way of trying to direct them to topic-appropriate material when they choose to independently work on the class computer and finally ended up as a group on Edmodo too that KS2 children could join. I therefore share: a teacher resource/blog with staff, a game with our EYFS children and a website promoting creativity with our KS2 children each week.
Managing the three sites to share each week is fairly easy to do - I just have a few lists set up on my Google Calendar which I add to whenever I find a site/a site is recommended to me by someone and which I then tick-off/clear once it has been shared.
I know that some schools operate a 'Digital Leaders' scheme in which several children are chosen to promote new tools to others and I have no doubt that this works in larger settings and in classrooms with less confident people. Personally though, I prefer to be a bit more inclusive - I share sites with everybody and if they want to explore them, they can. Indeed, I let our KS2 children suggest sites to me that they think are good enough to be made the 'website of the week' and they like it when their discovery is made 'public'.
Anyway, what I'm basically trying to say is that I've found that pushing a website just once a week is extremely effective - it doesn't overwhelm people and it also gives me some valuable time to properly evaluate a site before I have a free week in which to publish it. I let people decide for themselves if each week's site is useful to them - I don't constantly talk about it but rather, let the 'buzz' come from them when they tell others to have a look at it.
You can view my 'websites of the week' here: