Now is the time to be getting out of bed very early and getting down to your local bird patch to listen to the dawn chorus.
You need to be up and about at least an hour before sunrise and see what you can hear and identify.
I have done a few organised RSPB dawn chorus walks in the past at Pulborough Brooks in Sussex and Minsmere in Suffolk and it really is a fantastic experience.
Not always easy for photography, but great for the wildlife. Much of your recognition skills will come about from recognising the subject by their song.
I bought myself the Collins CD sound guide a few years ago to help my recognition skills, link below. Great to listen to in the car on the way to the site.
Many of the species song are quite distinct so the benefits will come from being able to identify the subtle differences between say a garden warbler or blackcap.