I guess I don’t which is why we got a problem. It feels overwhelming, I try to keep my partner going and myself started and I fail at both.
Any transition that occurs from a condom install to change in position can infect my mind with a sliver of doubt that then grows to fear and panic is seconds and it’s all over.
Kissing and foreplay
Do lots of other things in bed that turn on my partner, seeing them turned on helps to get/keep me hard
Focusing on what feels good, my own enjoyment without judgment
Keep having sexual thoughts that I like that I see in porn
I find that a bit of distraction or refocusing can make a difference. Some sexy talk with my partner, or just touching and kissing and enjoying that helps. At times, putting on a sexy movie in the background can help a bit.
have her put it on
Switch the focus to my girlfriend
When things do go well, mixing positions can help the sexual flow going. Even if that’s just switching who goes on top for example.
I try to adjust to another position or restart the foreplay to try and relax myself.
The last time, I just let go and allowed my partner to go down on me and work up my erection. I stopped thinking that being flaccid is an issue and let her take control of getting me erect. Once I did and focussed on what she was doing and how it made me feel, I was able to get an erection and maintain it.
Still trying to figure this part out
Try to brush it off with a comment, “I just take a while to get fully relaxed” or if confident enough ask them to pleasure me somewhere else (avoid my penis) while I attempt to get back in the moment
I discussed my issue with partners and described the pressure I sometimes feel when the focus is on myself. So during intercourse if I lost my erection, we would switch to masturbating in front of one another or I would switch to pleasuring my partner in other ways.
In the past, this often removed the focus from myself and helped me get hard again. It hasn’t been working as well more recently.
Focusing on my partner and her body instead of my anxiety can help keep the flow going.
Keep touching, feeling your partner. Move quickly between activities.
Maybe ask her to kiss me or play with my balls 
during putting it on
For me, kissing all the while is the best way of keeping the flow going. Also enjoy pressing different parts of her body all the time. Some dirty talk and q&a is always fun
Get her to fondle your balls as you put the condom on