GoingCandid

Upload them continuously
Try not to overload your Flickr account and your contacts by uploading a lot of
photos at once. Keep the upload stream low and upload just 1-2 photos a day.
You may upload one in the morning and one in the evening. Like this your
photos get the biggest attention. Depending on your location you may upload
your photos at the time when the biggest Flickr crowd (probably the USA) is
getting up in the morning. You may also change the time when you upload
and figure out when it's best to do so. The point of time, when you upload a
photo, is very important.
Geo-tag your photos
Flickr has a feature to tag the location of your photos. Just make a use of it.
Especially when you search in a certain area like a city you visit, you may want
to find the good spots for street photography or find some good photographers
who are in that city very often to shoot their photos. With the map and
the view option you can really find a lot of good photos.
Tag your photos
A lot of marketing people search in Flickr for photos they want to use for different
publications. The better you tag your photos, the higher the chances
are that they find your photos. You can have up to 75 tags per photo as a Pro
user. Use this feature as it is quite handy. You can also mass tag your photos
in "Organize & Create" which is even easier. Please don't use tags which don't
apply to your photos just to get attention. It's about marketing, not about
spamming.
Add your photos to groups
With a pro account, you can add your photos to 60 groups (10 on a free account)
in Flickr. Use this option to get your photos visible to a big audience.
First of all you have to join a group, before you can add photos. It's important
that you only post photos to groups related to street photography or at least
about what is visible on your photo. I have posted my shoes also in the "Foot
Fetish" and "High Heels" group just to be sure that these people have also
something from my photos. Since nobody complained so far, I guess it is fine.