Depends on what you are after but following are a few links that might find you different birds.
Crested Tit you may find at the feeders at Loch Garten. Failing that you should see them on a walk close to Loch Garten that goes to Loch Mallachie. The walk starts at NH971185. I have had them close to the car park a few times. Click here to see where I mean .
http://www.streetmap.co.uk/newmap.s...&mapp=newmap.srf&searchp=newsearch.srf&dn=819
Crossbills are at Forest Lodge, amongst many other places. NJ019161. Click here for link
http://www.streetmap.co.uk/newmap.s...&mapp=newmap.srf&searchp=newsearch.srf&dn=819.
Black Grouse and Slavonian Grebes (breeding) are at Loch Ruthven. Black Grouse are to the right and up the hill of the car park. Slav's can be seen from the car park (distantly) but you can walk to a hide to see them better, NH638281. Click here for the link
http://www.streetmap.co.uk/newmap.s...&mapp=newmap.srf&searchp=newsearch.srf&dn=819 (a very early arrival is recommended)
Ring Ouzel are at Sloch Summit on the side of the A9. NH841253. If you are approaching it northwards (towards Inverness) park at the layby on the right at the start of the summit. Walk along the fence and look at the bottom of the gulley in front of you and work your bins up and down the slope. I have had them there every time I have looked for them. Click here for link
http://www.streetmap.co.uk/newmap.s...&mapp=newmap.srf&searchp=newsearch.srf&dn=819
Black throated Diver(breeding) should be at Lochendorb which is north of Grantown on Spey. NH975360 You will also see quite a few Red Grouse here as well. Click here for link
http://www.streetmap.co.uk/newmap.s...&mapp=newmap.srf&searchp=newsearch.srf&dn=819.
Golden Eagle (Possible) are possibly can be found at Findhorn Valley also Dippers along the stream. Possible Ring Ouzel past the end of the road, which is a few miles long. You get there by turning off at the next left turn past Sloch Summit which heads towards Tomatin. You cross the bridge and then turn left and follow that road right through to where there is a small clump of buildings. You are not alowed to drive the car further but you can walk along the road there. Scan anwhere along the ridges on this route and you could be in for a treat. Ring Ouzels can also be found along the walk from the car on the right hand side of the track.
Ptarmigan, if you don't get them on the Cairngorms they can be found at the Bealach na Ba summit Nr Applecross. Click here for the link
http://www.streetmap.co.uk/newmap.s...&mapp=newmap.srf&searchp=newsearch.srf&dn=819. Where you park up you will see a mast on a summit. You walk to it and on the way, near the top, you can come across them. It is not a long walk and it is easy. Before you do start the walk scan the area from the car park. You can sometimes see them from there.
There are many more places but these few might help.
Have a great time and don't forget to let us all know how you got on.