For me personally there is no place better to start researching a fishing venue than your local tackle shop, they see anglers in there every day and often spend there time building a repour with the regulars and this includes getting all the inside information on how venues are fishing, what bait is being used and what methods they are using.
With YouTube being so readily available to even the most technophobe it means more videos that ever are being uploaded, searching YouTube for the venues name will often pop up a fair few results you can then sit back and watch the ones most relevant to you.
Using the popular search engine google will often pop up some results for the fishing venue you are wishing to visit with the possibility bloggers & vloggers posting about them along with some of the more popular fishing magazines doing the same.
Facebook is filled with groups like Fishing In Taunton, Taunton Angling Association, Bridgwater Angling Forum & Southwest Sea Fishing are just a few to mention these will groups will allow you to read other members catch reports and adventures along with post to ask other anglers where is fishing well at the moment.
The simplest response to this question is all of the above, Talking to your local fishing tackle shops they will inform you of all venues that are currently fishing very well.
Google “Fishing Venues Near Me” will also provide you with a list of results that you can then find a venue that suits your requirements.
Check your favourited YouTube channels and see where they are fishing, sometimes it maybe close and it will also give you some of the tactics at the same time.
Check your favourited Facebook groups to see where others are fishing.
In conclusion local knowledge is key into fishing correctly at a new venue or finding a new venue to fish. If your research is done correctly it can save you money by driving to a venue that is fishing poorly or buying bait that is currently not working at the fishery or natural venue.